Runtime resource overlay, iteration 1.
Runtime resource overlay allows unmodified applications to appear as if they had been compiled with additional resources defined. See libs/utils/README for more information. This commit is the first iteration of runtime resource overlay. It provides the actual overlay modifications and loading of trusted overlay packages (ie residing in /vendor) targeting framework-res.apk. This commit loads exactly one overlay package. The overlay, if present, must target framework-res.apk and be located at /vendor/overlay/framework/framework-res.apk. Change-Id: If26ee7754813004a96c043dba37fbe99fa3919db
This commit is contained in:
Mårten Kongstad
Kenneth Andersson
parent
0686717d79
commit
5f29c87ef2
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@ -222,6 +222,7 @@ private:
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{
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String8 path;
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FileType type;
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String8 idmap;
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};
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Asset* openInPathLocked(const char* fileName, AccessMode mode,
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@ -262,6 +263,16 @@ private:
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void setLocaleLocked(const char* locale);
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void updateResourceParamsLocked() const;
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bool createIdmapFileLocked(const String8& originalPath, const String8& overlayPath,
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const String8& idmapPath);
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bool isIdmapStaleLocked(const String8& originalPath, const String8& overlayPath,
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const String8& idmapPath);
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Asset* openIdmapLocked(const struct asset_path& ap) const;
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bool getZipEntryCrcLocked(const String8& zipPath, const char* entryFilename, uint32_t* pCrc);
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class SharedZip : public RefBase {
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public:
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static sp<SharedZip> get(const String8& path);
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@ -1735,9 +1735,9 @@ public:
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~ResTable();
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status_t add(const void* data, size_t size, void* cookie,
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bool copyData=false);
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bool copyData=false, const void* idmap = NULL);
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status_t add(Asset* asset, void* cookie,
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bool copyData=false);
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bool copyData=false, const void* idmap = NULL);
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status_t add(ResTable* src);
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status_t getError() const;
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@ -1981,6 +1981,24 @@ public:
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void getLocales(Vector<String8>* locales) const;
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// Generate an idmap.
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//
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// Return value: on success: NO_ERROR; caller is responsible for free-ing
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// outData (using free(3)). On failure, any status_t value other than
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// NO_ERROR; the caller should not free outData.
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status_t createIdmap(const ResTable& overlay, uint32_t originalCrc, uint32_t overlayCrc,
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void** outData, size_t* outSize) const;
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enum {
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IDMAP_HEADER_SIZE_BYTES = 3 * sizeof(uint32_t),
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};
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// Retrieve idmap meta-data.
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//
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// This function only requires the idmap header (the first
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// IDMAP_HEADER_SIZE_BYTES) bytes of an idmap file.
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static bool getIdmapInfo(const void* idmap, size_t size,
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uint32_t* pOriginalCrc, uint32_t* pOverlayCrc);
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#ifndef HAVE_ANDROID_OS
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void print(bool inclValues) const;
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static String8 normalizeForOutput(const char* input);
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@ -1994,7 +2012,7 @@ private:
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struct bag_set;
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status_t add(const void* data, size_t size, void* cookie,
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Asset* asset, bool copyData);
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Asset* asset, bool copyData, const Asset* idmap);
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ssize_t getResourcePackageIndex(uint32_t resID) const;
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ssize_t getEntry(
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@ -2003,7 +2021,7 @@ private:
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const ResTable_type** outType, const ResTable_entry** outEntry,
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const Type** outTypeClass) const;
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status_t parsePackage(
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const ResTable_package* const pkg, const Header* const header);
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const ResTable_package* const pkg, const Header* const header, uint32_t idmap_id);
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void print_value(const Package* pkg, const Res_value& value) const;
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@ -36,6 +36,19 @@
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#include <dirent.h>
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#include <errno.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#ifndef TEMP_FAILURE_RETRY
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/* Used to retry syscalls that can return EINTR. */
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#define TEMP_FAILURE_RETRY(exp) ({ \
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typeof (exp) _rc; \
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do { \
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_rc = (exp); \
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} while (_rc == -1 && errno == EINTR); \
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_rc; })
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#endif
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using namespace android;
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@ -48,6 +61,7 @@ static const char* kDefaultVendor = "default";
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static const char* kAssetsRoot = "assets";
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static const char* kAppZipName = NULL; //"classes.jar";
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static const char* kSystemAssets = "framework/framework-res.apk";
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static const char* kIdmapCacheDir = "resource-cache";
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static const char* kExcludeExtension = ".EXCLUDE";
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@ -55,6 +69,35 @@ static Asset* const kExcludedAsset = (Asset*) 0xd000000d;
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static volatile int32_t gCount = 0;
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namespace {
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// Transform string /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
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String8 idmapPathForPackagePath(const String8& pkgPath)
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{
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const char* root = getenv("ANDROID_DATA");
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LOG_ALWAYS_FATAL_IF(root == NULL, "ANDROID_DATA not set");
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String8 path(root);
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path.appendPath(kIdmapCacheDir);
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char buf[256]; // 256 chars should be enough for anyone...
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strncpy(buf, pkgPath.string(), 255);
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buf[255] = '\0';
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char* filename = buf;
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while (*filename && *filename == '/') {
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++filename;
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}
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char* p = filename;
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while (*p) {
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if (*p == '/') {
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*p = '@';
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}
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++p;
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}
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path.appendPath(filename);
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path.append("@idmap");
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return path;
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}
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}
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/*
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* ===========================================================================
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@ -122,7 +165,7 @@ bool AssetManager::addAssetPath(const String8& path, void** cookie)
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return true;
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}
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}
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LOGV("In %p Asset %s path: %s", this,
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ap.type == kFileTypeDirectory ? "dir" : "zip", ap.path.string());
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@ -133,9 +176,181 @@ bool AssetManager::addAssetPath(const String8& path, void** cookie)
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*cookie = (void*)mAssetPaths.size();
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}
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// add overlay packages for /system/framework; apps are handled by the
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// (Java) package manager
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if (strncmp(path.string(), "/system/framework/", 18) == 0) {
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// When there is an environment variable for /vendor, this
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// should be changed to something similar to how ANDROID_ROOT
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// and ANDROID_DATA are used in this file.
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String8 overlayPath("/vendor/overlay/framework/");
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overlayPath.append(path.getPathLeaf());
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if (TEMP_FAILURE_RETRY(access(overlayPath.string(), R_OK)) == 0) {
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asset_path oap;
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oap.path = overlayPath;
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oap.type = ::getFileType(overlayPath.string());
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bool addOverlay = (oap.type == kFileTypeRegular); // only .apks supported as overlay
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if (addOverlay) {
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oap.idmap = idmapPathForPackagePath(overlayPath);
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if (isIdmapStaleLocked(ap.path, oap.path, oap.idmap)) {
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addOverlay = createIdmapFileLocked(ap.path, oap.path, oap.idmap);
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}
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}
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if (addOverlay) {
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mAssetPaths.add(oap);
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} else {
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LOGW("failed to add overlay package %s\n", overlayPath.string());
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}
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}
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}
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return true;
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}
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bool AssetManager::isIdmapStaleLocked(const String8& originalPath, const String8& overlayPath,
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const String8& idmapPath)
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{
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struct stat st;
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if (TEMP_FAILURE_RETRY(stat(idmapPath.string(), &st)) == -1) {
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if (errno == ENOENT) {
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return true; // non-existing idmap is always stale
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} else {
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LOGW("failed to stat file %s: %s\n", idmapPath.string(), strerror(errno));
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return false;
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}
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}
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if (st.st_size < ResTable::IDMAP_HEADER_SIZE_BYTES) {
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LOGW("file %s has unexpectedly small size=%zd\n", idmapPath.string(), (size_t)st.st_size);
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return false;
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}
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int fd = TEMP_FAILURE_RETRY(::open(idmapPath.string(), O_RDONLY));
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if (fd == -1) {
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LOGW("failed to open file %s: %s\n", idmapPath.string(), strerror(errno));
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return false;
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}
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char buf[ResTable::IDMAP_HEADER_SIZE_BYTES];
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ssize_t bytesLeft = ResTable::IDMAP_HEADER_SIZE_BYTES;
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for (;;) {
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ssize_t r = TEMP_FAILURE_RETRY(read(fd, buf + ResTable::IDMAP_HEADER_SIZE_BYTES - bytesLeft,
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bytesLeft));
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if (r < 0) {
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TEMP_FAILURE_RETRY(close(fd));
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return false;
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}
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bytesLeft -= r;
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if (bytesLeft == 0) {
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break;
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}
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}
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TEMP_FAILURE_RETRY(close(fd));
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uint32_t cachedOriginalCrc, cachedOverlayCrc;
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if (!ResTable::getIdmapInfo(buf, ResTable::IDMAP_HEADER_SIZE_BYTES,
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&cachedOriginalCrc, &cachedOverlayCrc)) {
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return false;
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}
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uint32_t actualOriginalCrc, actualOverlayCrc;
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if (!getZipEntryCrcLocked(originalPath, "resources.arsc", &actualOriginalCrc)) {
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return false;
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}
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if (!getZipEntryCrcLocked(overlayPath, "resources.arsc", &actualOverlayCrc)) {
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return false;
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}
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return cachedOriginalCrc != actualOriginalCrc || cachedOverlayCrc != actualOverlayCrc;
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}
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bool AssetManager::getZipEntryCrcLocked(const String8& zipPath, const char* entryFilename,
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uint32_t* pCrc)
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{
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asset_path ap;
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ap.path = zipPath;
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const ZipFileRO* zip = getZipFileLocked(ap);
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if (zip == NULL) {
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return false;
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}
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const ZipEntryRO entry = zip->findEntryByName(entryFilename);
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if (entry == NULL) {
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return false;
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}
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if (!zip->getEntryInfo(entry, NULL, NULL, NULL, NULL, NULL, (long*)pCrc)) {
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return false;
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}
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return true;
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}
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bool AssetManager::createIdmapFileLocked(const String8& originalPath, const String8& overlayPath,
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const String8& idmapPath)
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{
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LOGD("%s: originalPath=%s overlayPath=%s idmapPath=%s\n",
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__FUNCTION__, originalPath.string(), overlayPath.string(), idmapPath.string());
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ResTable tables[2];
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const String8* paths[2] = { &originalPath, &overlayPath };
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uint32_t originalCrc, overlayCrc;
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bool retval = false;
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ssize_t offset = 0;
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int fd = 0;
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uint32_t* data = NULL;
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size_t size;
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for (int i = 0; i < 2; ++i) {
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asset_path ap;
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ap.type = kFileTypeRegular;
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ap.path = *paths[i];
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Asset* ass = openNonAssetInPathLocked("resources.arsc", Asset::ACCESS_BUFFER, ap);
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if (ass == NULL) {
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LOGW("failed to find resources.arsc in %s\n", ap.path.string());
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goto error;
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}
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tables[i].add(ass, (void*)1, false);
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}
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if (!getZipEntryCrcLocked(originalPath, "resources.arsc", &originalCrc)) {
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LOGW("failed to retrieve crc for resources.arsc in %s\n", originalPath.string());
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goto error;
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}
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if (!getZipEntryCrcLocked(overlayPath, "resources.arsc", &overlayCrc)) {
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LOGW("failed to retrieve crc for resources.arsc in %s\n", overlayPath.string());
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goto error;
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}
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if (tables[0].createIdmap(tables[1], originalCrc, overlayCrc,
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(void**)&data, &size) != NO_ERROR) {
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LOGW("failed to generate idmap data for file %s\n", idmapPath.string());
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goto error;
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}
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// This should be abstracted (eg replaced by a stand-alone
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// application like dexopt, triggered by something equivalent to
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// installd).
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fd = TEMP_FAILURE_RETRY(::open(idmapPath.string(), O_WRONLY | O_CREAT | O_TRUNC, 0644));
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if (fd == -1) {
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LOGW("failed to write idmap file %s (open: %s)\n", idmapPath.string(), strerror(errno));
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goto error_free;
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}
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for (;;) {
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ssize_t written = TEMP_FAILURE_RETRY(write(fd, data + offset, size));
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if (written < 0) {
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LOGW("failed to write idmap file %s (write: %s)\n", idmapPath.string(),
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strerror(errno));
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goto error_close;
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}
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size -= (size_t)written;
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offset += written;
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if (size == 0) {
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break;
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}
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}
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retval = true;
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error_close:
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TEMP_FAILURE_RETRY(close(fd));
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error_free:
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free(data);
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error:
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return retval;
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}
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bool AssetManager::addDefaultAssets()
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{
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const char* root = getenv("ANDROID_ROOT");
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@ -404,6 +619,7 @@ const ResTable* AssetManager::getResTable(bool required) const
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ResTable* sharedRes = NULL;
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bool shared = true;
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const asset_path& ap = mAssetPaths.itemAt(i);
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Asset* idmap = openIdmapLocked(ap);
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LOGV("Looking for resource asset in '%s'\n", ap.path.string());
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if (ap.type != kFileTypeDirectory) {
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if (i == 0) {
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@ -433,7 +649,7 @@ const ResTable* AssetManager::getResTable(bool required) const
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// can quickly copy it out for others.
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LOGV("Creating shared resources for %s", ap.path.string());
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sharedRes = new ResTable();
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sharedRes->add(ass, (void*)(i+1), false);
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sharedRes->add(ass, (void*)(i+1), false, idmap);
|
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sharedRes = const_cast<AssetManager*>(this)->
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mZipSet.setZipResourceTable(ap.path, sharedRes);
|
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}
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@ -457,7 +673,7 @@ const ResTable* AssetManager::getResTable(bool required) const
|
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rt->add(sharedRes);
|
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} else {
|
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LOGV("Parsing resources for %s", ap.path.string());
|
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rt->add(ass, (void*)(i+1), !shared);
|
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rt->add(ass, (void*)(i+1), !shared, idmap);
|
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}
|
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|
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if (!shared) {
|
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|
|
@ -498,6 +714,21 @@ void AssetManager::updateResourceParamsLocked() const
|
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res->setParameters(mConfig);
|
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}
|
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|
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Asset* AssetManager::openIdmapLocked(const struct asset_path& ap) const
|
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{
|
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Asset* ass = NULL;
|
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if (ap.idmap.size() != 0) {
|
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ass = const_cast<AssetManager*>(this)->
|
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openAssetFromFileLocked(ap.idmap, Asset::ACCESS_BUFFER);
|
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if (ass) {
|
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LOGV("loading idmap %s\n", ap.idmap.string());
|
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} else {
|
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LOGW("failed to load idmap %s\n", ap.idmap.string());
|
||||
}
|
||||
}
|
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return ass;
|
||||
}
|
||||
|
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const ResTable& AssetManager::getResources(bool required) const
|
||||
{
|
||||
const ResTable* rt = getResTable(required);
|
||||
|
|
|
|||
|
|
@ -1,4 +1,6 @@
|
|||
Android Utility Function Library
|
||||
================================
|
||||
|
||||
|
||||
If you need a feature that is native to Linux but not present on other
|
||||
platforms, construct a platform-dependent implementation that shares
|
||||
|
|
@ -12,3 +14,276 @@ The ultimate goal is *not* to create a super-duper platform abstraction
|
|||
layer. The goal is to provide an optimized solution for Linux with
|
||||
reasonable implementations for other platforms.
|
||||
|
||||
|
||||
|
||||
Resource overlay
|
||||
================
|
||||
|
||||
|
||||
Introduction
|
||||
------------
|
||||
|
||||
Overlay packages are special .apk files which provide no code but
|
||||
additional resource values (and possibly new configurations) for
|
||||
resources in other packages. When an application requests resources,
|
||||
the system will return values from either the application's original
|
||||
package or any associated overlay package. Any redirection is completely
|
||||
transparent to the calling application.
|
||||
|
||||
Resource values have the following precedence table, listed in
|
||||
descending precedence.
|
||||
|
||||
* overlay package, matching config (eg res/values-en-land)
|
||||
|
||||
* original package, matching config
|
||||
|
||||
* overlay package, no config (eg res/values)
|
||||
|
||||
* original package, no config
|
||||
|
||||
During compilation, overlay packages are differentiated from regular
|
||||
packages by passing the -o flag to aapt.
|
||||
|
||||
|
||||
Background
|
||||
----------
|
||||
|
||||
This section provides generic background material on resources in
|
||||
Android.
|
||||
|
||||
|
||||
How resources are bundled in .apk files
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
Android .apk files are .zip files, usually housing .dex code,
|
||||
certificates and resources, though packages containing resources but
|
||||
no code are possible. Resources can be divided into the following
|
||||
categories; a `configuration' indicates a set of phone language, display
|
||||
density, network operator, etc.
|
||||
|
||||
* assets: uncompressed, raw files packaged as part of an .apk and
|
||||
explicitly referenced by filename. These files are
|
||||
independent of configuration.
|
||||
|
||||
* res/drawable: bitmap or xml graphics. Each file may have different
|
||||
values depending on configuration.
|
||||
|
||||
* res/values: integers, strings, etc. Each resource may have different
|
||||
values depending on configuration.
|
||||
|
||||
Resource meta information and information proper is stored in a binary
|
||||
format in a named file resources.arsc, bundled as part of the .apk.
|
||||
|
||||
Resource IDs and lookup
|
||||
~~~~~~~~~~~~~~~~~~~~~~~
|
||||
During compilation, the aapt tool gathers application resources and
|
||||
generates a resources.arsc file. Each resource name is assigned an
|
||||
integer ID 0xppttiii (translated to a symbolic name via R.java), where
|
||||
|
||||
* pp: corresponds to the package namespace (details below).
|
||||
|
||||
* tt: corresponds to the resource type (string, int, etc). Every
|
||||
resource of the same type within the same package has the same
|
||||
tt value, but depending on available types, the actual numerical
|
||||
value may be different between packages.
|
||||
|
||||
* iiii: sequential number, assigned in the order resources are found.
|
||||
|
||||
Resource values are specified paired with a set of configuration
|
||||
constraints (the default being the empty set), eg res/values-sv-port
|
||||
which imposes restrictions on language (Swedish) and display orientation
|
||||
(portrait). During lookup, every constraint set is matched against the
|
||||
current configuration, and the value corresponding to the best matching
|
||||
constraint set is returned (ResourceTypes.{h,cpp}).
|
||||
|
||||
Parsing of resources.arsc is handled by ResourceTypes.cpp; this utility
|
||||
is governed by AssetManager.cpp, which tracks loaded resources per
|
||||
process.
|
||||
|
||||
Assets are looked up by path and filename in AssetManager.cpp. The path
|
||||
to resources in res/drawable are located by ResourceTypes.cpp and then
|
||||
handled like assets by AssetManager.cpp. Other resources are handled
|
||||
solely by ResourceTypes.cpp.
|
||||
|
||||
Package ID as namespace
|
||||
~~~~~~~~~~~~~~~~~~~~~~~
|
||||
The pp part of a resource ID defines a namespace. Android currently
|
||||
defines two namespaces:
|
||||
|
||||
* 0x01: system resources (pre-installed in framework-res.apk)
|
||||
|
||||
* 0x7f: application resources (bundled in the application .apk)
|
||||
|
||||
ResourceTypes.cpp supports package IDs between 0x01 and 0x7f
|
||||
(inclusive); values outside this range are invalid.
|
||||
|
||||
Each running (Dalvik) process is assigned a unique instance of
|
||||
AssetManager, which in turn keeps a forest structure of loaded
|
||||
resource.arsc files. Normally, this forest is structured as follows,
|
||||
where mPackageMap is the internal vector employed in ResourceTypes.cpp.
|
||||
|
||||
mPackageMap[0x00] -> system package
|
||||
mPackageMap[0x01] -> NULL
|
||||
mPackageMap[0x02] -> NULL
|
||||
...
|
||||
mPackageMap[0x7f - 2] -> NULL
|
||||
mPackageMap[0x7f - 1] -> application package
|
||||
|
||||
|
||||
|
||||
The resource overlay extension
|
||||
------------------------------
|
||||
|
||||
The resource overlay mechanism aims to (partly) shadow and extend
|
||||
existing resources with new values for defined and new configurations.
|
||||
Technically, this is achieved by adding resource-only packages (called
|
||||
overlay packages) to existing resource namespaces, like so:
|
||||
|
||||
mPackageMap[0x00] -> system package -> system overlay package
|
||||
mPackageMap[0x01] -> NULL
|
||||
mPackageMap[0x02] -> NULL
|
||||
...
|
||||
mPackageMap[0x7f - 2] -> NULL
|
||||
mPackageMap[0x7f - 1] -> application package -> overlay 1 -> overlay 2
|
||||
|
||||
The use of overlay resources is completely transparent to
|
||||
applications; no additional resource identifiers are introduced, only
|
||||
configuration/value pairs. Any number of overlay packages may be loaded
|
||||
at a time; overlay packages are agnostic to what they target -- both
|
||||
system and application resources are fair game.
|
||||
|
||||
The package targeted by an overlay package is called the target or
|
||||
original package.
|
||||
|
||||
Resource overlay operates on symbolic resources names. Hence, to
|
||||
override the string/str1 resources in a package, the overlay package
|
||||
would include a resource also named string/str1. The end user does not
|
||||
have to worry about the numeric resources IDs assigned by aapt, as this
|
||||
is resolved automatically by the system.
|
||||
|
||||
As of this writing, the use of resource overlay has not been fully
|
||||
explored. Until it has, only OEMs are trusted to use resource overlay.
|
||||
For this reason, overlay packages must reside in /system/overlay.
|
||||
|
||||
|
||||
Resource ID mapping
|
||||
~~~~~~~~~~~~~~~~~~~
|
||||
Resource identifiers must be coherent within the same namespace (ie
|
||||
PackageGroup in ResourceTypes.cpp). Calling applications will refer to
|
||||
resources using the IDs defined in the original package, but there is no
|
||||
guarantee aapt has assigned the same ID to the corresponding resource in
|
||||
an overlay package. To translate between the two, a resource ID mapping
|
||||
{original ID -> overlay ID} is created during package installation
|
||||
(PackageManagerService.java) and used during resource lookup. The
|
||||
mapping is stored in /data/resource-cache, with a @idmap file name
|
||||
suffix.
|
||||
|
||||
The idmap file format is documented in a separate section, below.
|
||||
|
||||
|
||||
Package management
|
||||
~~~~~~~~~~~~~~~~~~
|
||||
Packages are managed by the PackageManagerService. Addition and removal
|
||||
of packages are monitored via the inotify framework, exposed via
|
||||
android.os.FileObserver.
|
||||
|
||||
During initialization of a Dalvik process, ActivityThread.java requests
|
||||
the process' AssetManager (by proxy, via AssetManager.java and JNI)
|
||||
to load a list of packages. This list includes overlay packages, if
|
||||
present.
|
||||
|
||||
When a target package or a corresponding overlay package is installed,
|
||||
the target package's process is stopped and a new idmap is generated.
|
||||
This is similar to how applications are stopped when their packages are
|
||||
upgraded.
|
||||
|
||||
|
||||
Creating overlay packages
|
||||
-------------------------
|
||||
|
||||
Overlay packages should contain no code, define (some) resources with
|
||||
the same type and name as in the original package, and be compiled with
|
||||
the -o flag passed to aapt.
|
||||
|
||||
The aapt -o flag instructs aapt to create an overlay package.
|
||||
Technically, this means the package will be assigned package id 0x00.
|
||||
|
||||
There are no restrictions on overlay packages names, though the naming
|
||||
convention <original.package.name>.overlay.<name> is recommended.
|
||||
|
||||
|
||||
Example overlay package
|
||||
~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
To overlay the resource bool/b in package com.foo.bar, to be applied
|
||||
when the display is in landscape mode, create a new package with
|
||||
no source code and a single .xml file under res/values-land, with
|
||||
an entry for bool/b. Compile with aapt -o and place the results in
|
||||
/system/overlay by adding the following to Android.mk:
|
||||
|
||||
LOCAL_AAPT_FLAGS := -o com.foo.bar
|
||||
LOCAL_MODULE_PATH := $(TARGET_OUT)/overlay
|
||||
|
||||
|
||||
The ID map (idmap) file format
|
||||
------------------------------
|
||||
|
||||
The idmap format is designed for lookup performance. However, leading
|
||||
and trailing undefined overlay values are discarded to reduce the memory
|
||||
footprint.
|
||||
|
||||
|
||||
idmap grammar
|
||||
~~~~~~~~~~~~~
|
||||
All atoms (names in square brackets) are uint32_t integers. The
|
||||
idmap-magic constant spells "idmp" in ASCII. Offsets are given relative
|
||||
to the data_header, not to the beginning of the file.
|
||||
|
||||
map := header data
|
||||
header := idmap-magic <crc32-original-pkg> <crc32-overlay-pkg>
|
||||
idmap-magic := <0x706d6469>
|
||||
data := data_header type_block+
|
||||
data_header := <m> header_block{m}
|
||||
header_block := <0> | <type_block_offset>
|
||||
type_block := <n> <id_offset> entry{n}
|
||||
entry := <resource_id_in_target_package>
|
||||
|
||||
|
||||
idmap example
|
||||
~~~~~~~~~~~~~
|
||||
Given a pair of target and overlay packages with CRC sums 0x216a8fe2
|
||||
and 0x6b9beaec, each defining the following resources
|
||||
|
||||
Name Target package Overlay package
|
||||
string/str0 0x7f010000 -
|
||||
string/str1 0x7f010001 0x7f010000
|
||||
string/str2 0x7f010002 -
|
||||
string/str3 0x7f010003 0x7f010001
|
||||
string/str4 0x7f010004 -
|
||||
bool/bool0 0x7f020000 -
|
||||
integer/int0 0x7f030000 0x7f020000
|
||||
integer/int1 0x7f030001 -
|
||||
|
||||
the corresponding resource map is
|
||||
|
||||
0x706d6469 0x216a8fe2 0x6b9beaec 0x00000003 \
|
||||
0x00000004 0x00000000 0x00000009 0x00000003 \
|
||||
0x00000001 0x7f010000 0x00000000 0x7f010001 \
|
||||
0x00000001 0x00000000 0x7f020000
|
||||
|
||||
or, formatted differently
|
||||
|
||||
0x706d6469 # magic: all idmap files begin with this constant
|
||||
0x216a8fe2 # CRC32 of the resources.arsc file in the original package
|
||||
0x6b9beaec # CRC32 of the resources.arsc file in the overlay package
|
||||
0x00000003 # header; three types (string, bool, integer) in the target package
|
||||
0x00000004 # header_block for type 0 (string) is located at offset 4
|
||||
0x00000000 # no bool type exists in overlay package -> no header_block
|
||||
0x00000009 # header_block for type 2 (integer) is located at offset 9
|
||||
0x00000003 # header_block for string; overlay IDs span 3 elements
|
||||
0x00000001 # the first string in target package is entry 1 == offset
|
||||
0x7f010000 # target 0x7f01001 -> overlay 0x7f010000
|
||||
0x00000000 # str2 not defined in overlay package
|
||||
0x7f010001 # target 0x7f010003 -> overlay 0x7f010001
|
||||
0x00000001 # header_block for integer; overlay IDs span 1 element
|
||||
0x00000000 # offset == 0
|
||||
0x7f020000 # target 0x7f030000 -> overlay 0x7f020000
|
||||
|
|
|
|||
|
|
@ -63,6 +63,10 @@ namespace android {
|
|||
#endif
|
||||
#endif
|
||||
|
||||
#define IDMAP_MAGIC 0x706d6469
|
||||
// size measured in sizeof(uint32_t)
|
||||
#define IDMAP_HEADER_SIZE (ResTable::IDMAP_HEADER_SIZE_BYTES / sizeof(uint32_t))
|
||||
|
||||
static void printToLogFunc(void* cookie, const char* txt)
|
||||
{
|
||||
LOGV("%s", txt);
|
||||
|
|
@ -214,6 +218,81 @@ static void deserializeInternal(const void* inData, Res_png_9patch* outData) {
|
|||
outData->colors = (uint32_t*) data;
|
||||
}
|
||||
|
||||
static bool assertIdmapHeader(const uint32_t* map, size_t sizeBytes)
|
||||
{
|
||||
if (sizeBytes < ResTable::IDMAP_HEADER_SIZE_BYTES) {
|
||||
LOGW("idmap assertion failed: size=%d bytes\n", sizeBytes);
|
||||
return false;
|
||||
}
|
||||
if (*map != htodl(IDMAP_MAGIC)) { // htodl: map data expected to be in correct endianess
|
||||
LOGW("idmap assertion failed: invalid magic found (is 0x%08x, expected 0x%08x)\n",
|
||||
*map, htodl(IDMAP_MAGIC));
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static status_t idmapLookup(const uint32_t* map, size_t sizeBytes, uint32_t key, uint32_t* outValue)
|
||||
{
|
||||
// see README for details on the format of map
|
||||
if (!assertIdmapHeader(map, sizeBytes)) {
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
map = map + IDMAP_HEADER_SIZE; // skip ahead to data segment
|
||||
// size of data block, in uint32_t
|
||||
const size_t size = (sizeBytes - ResTable::IDMAP_HEADER_SIZE_BYTES) / sizeof(uint32_t);
|
||||
const uint32_t type = Res_GETTYPE(key) + 1; // add one, idmap stores "public" type id
|
||||
const uint32_t entry = Res_GETENTRY(key);
|
||||
const uint32_t typeCount = *map;
|
||||
|
||||
if (type > typeCount) {
|
||||
LOGW("Resource ID map: type=%d exceeds number of types=%d\n", type, typeCount);
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
if (typeCount > size) {
|
||||
LOGW("Resource ID map: number of types=%d exceeds size of map=%d\n", typeCount, size);
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
const uint32_t typeOffset = map[type];
|
||||
if (typeOffset == 0) {
|
||||
*outValue = 0;
|
||||
return NO_ERROR;
|
||||
}
|
||||
if (typeOffset + 1 > size) {
|
||||
LOGW("Resource ID map: type offset=%d exceeds reasonable value, size of map=%d\n",
|
||||
typeOffset, size);
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
const uint32_t entryCount = map[typeOffset];
|
||||
const uint32_t entryOffset = map[typeOffset + 1];
|
||||
if (entryCount == 0 || entry < entryOffset || entry - entryOffset > entryCount - 1) {
|
||||
*outValue = 0;
|
||||
return NO_ERROR;
|
||||
}
|
||||
const uint32_t index = typeOffset + 2 + entry - entryOffset;
|
||||
if (index > size) {
|
||||
LOGW("Resource ID map: entry index=%d exceeds size of map=%d\n", index, size);
|
||||
*outValue = 0;
|
||||
return NO_ERROR;
|
||||
}
|
||||
*outValue = map[index];
|
||||
|
||||
return NO_ERROR;
|
||||
}
|
||||
|
||||
static status_t getIdmapPackageId(const uint32_t* map, size_t mapSize, uint32_t *outId)
|
||||
{
|
||||
if (!assertIdmapHeader(map, mapSize)) {
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
const uint32_t* p = map + IDMAP_HEADER_SIZE + 1;
|
||||
while (*p == 0) {
|
||||
++p;
|
||||
}
|
||||
*outId = (map[*p + IDMAP_HEADER_SIZE + 2] >> 24) & 0x000000ff;
|
||||
return NO_ERROR;
|
||||
}
|
||||
|
||||
Res_png_9patch* Res_png_9patch::deserialize(const void* inData)
|
||||
{
|
||||
if (sizeof(void*) != sizeof(int32_t)) {
|
||||
|
|
@ -1235,7 +1314,13 @@ status_t ResXMLTree::validateNode(const ResXMLTree_node* node) const
|
|||
|
||||
struct ResTable::Header
|
||||
{
|
||||
Header(ResTable* _owner) : owner(_owner), ownedData(NULL), header(NULL) { }
|
||||
Header(ResTable* _owner) : owner(_owner), ownedData(NULL), header(NULL),
|
||||
resourceIDMap(NULL), resourceIDMapSize(0) { }
|
||||
|
||||
~Header()
|
||||
{
|
||||
free(resourceIDMap);
|
||||
}
|
||||
|
||||
ResTable* const owner;
|
||||
void* ownedData;
|
||||
|
|
@ -1246,6 +1331,8 @@ struct ResTable::Header
|
|||
void* cookie;
|
||||
|
||||
ResStringPool values;
|
||||
uint32_t* resourceIDMap;
|
||||
size_t resourceIDMapSize;
|
||||
};
|
||||
|
||||
struct ResTable::Type
|
||||
|
|
@ -1661,12 +1748,13 @@ inline ssize_t ResTable::getResourcePackageIndex(uint32_t resID) const
|
|||
return ((ssize_t)mPackageMap[Res_GETPACKAGE(resID)+1])-1;
|
||||
}
|
||||
|
||||
status_t ResTable::add(const void* data, size_t size, void* cookie, bool copyData)
|
||||
status_t ResTable::add(const void* data, size_t size, void* cookie, bool copyData,
|
||||
const void* idmap)
|
||||
{
|
||||
return add(data, size, cookie, NULL, copyData);
|
||||
return add(data, size, cookie, NULL, copyData, reinterpret_cast<const Asset*>(idmap));
|
||||
}
|
||||
|
||||
status_t ResTable::add(Asset* asset, void* cookie, bool copyData)
|
||||
status_t ResTable::add(Asset* asset, void* cookie, bool copyData, const void* idmap)
|
||||
{
|
||||
const void* data = asset->getBuffer(true);
|
||||
if (data == NULL) {
|
||||
|
|
@ -1674,7 +1762,7 @@ status_t ResTable::add(Asset* asset, void* cookie, bool copyData)
|
|||
return UNKNOWN_ERROR;
|
||||
}
|
||||
size_t size = (size_t)asset->getLength();
|
||||
return add(data, size, cookie, asset, copyData);
|
||||
return add(data, size, cookie, asset, copyData, reinterpret_cast<const Asset*>(idmap));
|
||||
}
|
||||
|
||||
status_t ResTable::add(ResTable* src)
|
||||
|
|
@ -1702,19 +1790,30 @@ status_t ResTable::add(ResTable* src)
|
|||
}
|
||||
|
||||
status_t ResTable::add(const void* data, size_t size, void* cookie,
|
||||
Asset* asset, bool copyData)
|
||||
Asset* asset, bool copyData, const Asset* idmap)
|
||||
{
|
||||
if (!data) return NO_ERROR;
|
||||
Header* header = new Header(this);
|
||||
header->index = mHeaders.size();
|
||||
header->cookie = cookie;
|
||||
if (idmap != NULL) {
|
||||
const size_t idmap_size = idmap->getLength();
|
||||
const void* idmap_data = const_cast<Asset*>(idmap)->getBuffer(true);
|
||||
header->resourceIDMap = (uint32_t*)malloc(idmap_size);
|
||||
if (header->resourceIDMap == NULL) {
|
||||
delete header;
|
||||
return (mError = NO_MEMORY);
|
||||
}
|
||||
memcpy((void*)header->resourceIDMap, idmap_data, idmap_size);
|
||||
header->resourceIDMapSize = idmap_size;
|
||||
}
|
||||
mHeaders.add(header);
|
||||
|
||||
const bool notDeviceEndian = htods(0xf0) != 0xf0;
|
||||
|
||||
LOAD_TABLE_NOISY(
|
||||
LOGV("Adding resources to ResTable: data=%p, size=0x%x, cookie=%p, asset=%p, copy=%d\n",
|
||||
data, size, cookie, asset, copyData));
|
||||
LOGV("Adding resources to ResTable: data=%p, size=0x%x, cookie=%p, asset=%p, copy=%d "
|
||||
"idmap=%p\n", data, size, cookie, asset, copyData, idmap));
|
||||
|
||||
if (copyData || notDeviceEndian) {
|
||||
header->ownedData = malloc(size);
|
||||
|
|
@ -1781,7 +1880,16 @@ status_t ResTable::add(const void* data, size_t size, void* cookie,
|
|||
dtohl(header->header->packageCount));
|
||||
return (mError=BAD_TYPE);
|
||||
}
|
||||
if (parsePackage((ResTable_package*)chunk, header) != NO_ERROR) {
|
||||
uint32_t idmap_id = 0;
|
||||
if (idmap != NULL) {
|
||||
uint32_t tmp;
|
||||
if (getIdmapPackageId(header->resourceIDMap,
|
||||
header->resourceIDMapSize,
|
||||
&tmp) == NO_ERROR) {
|
||||
idmap_id = tmp;
|
||||
}
|
||||
}
|
||||
if (parsePackage((ResTable_package*)chunk, header, idmap_id) != NO_ERROR) {
|
||||
return mError;
|
||||
}
|
||||
curPackage++;
|
||||
|
|
@ -1803,6 +1911,7 @@ status_t ResTable::add(const void* data, size_t size, void* cookie,
|
|||
if (mError != NO_ERROR) {
|
||||
LOGW("No string values found in resource table!");
|
||||
}
|
||||
|
||||
TABLE_NOISY(LOGV("Returning from add with mError=%d\n", mError));
|
||||
return mError;
|
||||
}
|
||||
|
|
@ -1925,17 +2034,38 @@ ssize_t ResTable::getResource(uint32_t resID, Res_value* outValue, bool mayBeBag
|
|||
size_t ip = grp->packages.size();
|
||||
while (ip > 0) {
|
||||
ip--;
|
||||
int T = t;
|
||||
int E = e;
|
||||
|
||||
const Package* const package = grp->packages[ip];
|
||||
if (package->header->resourceIDMap) {
|
||||
uint32_t overlayResID = 0x0;
|
||||
status_t retval = idmapLookup(package->header->resourceIDMap,
|
||||
package->header->resourceIDMapSize,
|
||||
resID, &overlayResID);
|
||||
if (retval == NO_ERROR && overlayResID != 0x0) {
|
||||
// for this loop iteration, this is the type and entry we really want
|
||||
LOGV("resource map 0x%08x -> 0x%08x\n", resID, overlayResID);
|
||||
T = Res_GETTYPE(overlayResID);
|
||||
E = Res_GETENTRY(overlayResID);
|
||||
} else {
|
||||
// resource not present in overlay package, continue with the next package
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
const ResTable_type* type;
|
||||
const ResTable_entry* entry;
|
||||
const Type* typeClass;
|
||||
ssize_t offset = getEntry(package, t, e, &mParams, &type, &entry, &typeClass);
|
||||
ssize_t offset = getEntry(package, T, E, &mParams, &type, &entry, &typeClass);
|
||||
if (offset <= 0) {
|
||||
if (offset < 0) {
|
||||
// No {entry, appropriate config} pair found in package. If this
|
||||
// package is an overlay package (ip != 0), this simply means the
|
||||
// overlay package did not specify a default.
|
||||
// Non-overlay packages are still required to provide a default.
|
||||
if (offset < 0 && ip == 0) {
|
||||
LOGW("Failure getting entry for 0x%08x (t=%d e=%d) in package %zd (error %d)\n",
|
||||
resID, t, e, ip, (int)offset);
|
||||
resID, T, E, ip, (int)offset);
|
||||
return offset;
|
||||
}
|
||||
continue;
|
||||
|
|
@ -1965,13 +2095,16 @@ ssize_t ResTable::getResource(uint32_t resID, Res_value* outValue, bool mayBeBag
|
|||
|
||||
if (outSpecFlags != NULL) {
|
||||
if (typeClass->typeSpecFlags != NULL) {
|
||||
*outSpecFlags |= dtohl(typeClass->typeSpecFlags[e]);
|
||||
*outSpecFlags |= dtohl(typeClass->typeSpecFlags[E]);
|
||||
} else {
|
||||
*outSpecFlags = -1;
|
||||
}
|
||||
}
|
||||
|
||||
if (bestPackage != NULL && bestItem.isMoreSpecificThan(thisConfig)) {
|
||||
|
||||
if (bestPackage != NULL &&
|
||||
(bestItem.isMoreSpecificThan(thisConfig) || bestItem.diff(thisConfig) == 0)) {
|
||||
// Discard thisConfig not only if bestItem is more specific, but also if the two configs
|
||||
// are identical (diff == 0), or overlay packages will not take effect.
|
||||
continue;
|
||||
}
|
||||
|
||||
|
|
@ -2165,21 +2298,45 @@ ssize_t ResTable::getBagLocked(uint32_t resID, const bag_entry** outBag,
|
|||
|
||||
TABLE_NOISY(LOGI("Building bag: %p\n", (void*)resID));
|
||||
|
||||
ResTable_config bestConfig;
|
||||
memset(&bestConfig, 0, sizeof(bestConfig));
|
||||
|
||||
// Now collect all bag attributes from all packages.
|
||||
size_t ip = grp->packages.size();
|
||||
while (ip > 0) {
|
||||
ip--;
|
||||
int T = t;
|
||||
int E = e;
|
||||
|
||||
const Package* const package = grp->packages[ip];
|
||||
if (package->header->resourceIDMap) {
|
||||
uint32_t overlayResID = 0x0;
|
||||
status_t retval = idmapLookup(package->header->resourceIDMap,
|
||||
package->header->resourceIDMapSize,
|
||||
resID, &overlayResID);
|
||||
if (retval == NO_ERROR && overlayResID != 0x0) {
|
||||
// for this loop iteration, this is the type and entry we really want
|
||||
LOGV("resource map 0x%08x -> 0x%08x\n", resID, overlayResID);
|
||||
T = Res_GETTYPE(overlayResID);
|
||||
E = Res_GETENTRY(overlayResID);
|
||||
} else {
|
||||
// resource not present in overlay package, continue with the next package
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
const ResTable_type* type;
|
||||
const ResTable_entry* entry;
|
||||
const Type* typeClass;
|
||||
LOGV("Getting entry pkg=%p, t=%d, e=%d\n", package, t, e);
|
||||
ssize_t offset = getEntry(package, t, e, &mParams, &type, &entry, &typeClass);
|
||||
LOGV("Getting entry pkg=%p, t=%d, e=%d\n", package, T, E);
|
||||
ssize_t offset = getEntry(package, T, E, &mParams, &type, &entry, &typeClass);
|
||||
LOGV("Resulting offset=%d\n", offset);
|
||||
if (offset <= 0) {
|
||||
if (offset < 0) {
|
||||
// No {entry, appropriate config} pair found in package. If this
|
||||
// package is an overlay package (ip != 0), this simply means the
|
||||
// overlay package did not specify a default.
|
||||
// Non-overlay packages are still required to provide a default.
|
||||
if (offset < 0 && ip == 0) {
|
||||
if (set) free(set);
|
||||
return offset;
|
||||
}
|
||||
|
|
@ -2192,6 +2349,15 @@ ssize_t ResTable::getBagLocked(uint32_t resID, const bag_entry** outBag,
|
|||
continue;
|
||||
}
|
||||
|
||||
if (set != NULL && !type->config.isBetterThan(bestConfig, NULL)) {
|
||||
continue;
|
||||
}
|
||||
bestConfig = type->config;
|
||||
if (set) {
|
||||
free(set);
|
||||
set = NULL;
|
||||
}
|
||||
|
||||
const uint16_t entrySize = dtohs(entry->size);
|
||||
const uint32_t parent = entrySize >= sizeof(ResTable_map_entry)
|
||||
? dtohl(((const ResTable_map_entry*)entry)->parent.ident) : 0;
|
||||
|
|
@ -2203,43 +2369,41 @@ ssize_t ResTable::getBagLocked(uint32_t resID, const bag_entry** outBag,
|
|||
TABLE_NOISY(LOGI("Found map: size=%p parent=%p count=%d\n",
|
||||
entrySize, parent, count));
|
||||
|
||||
if (set == NULL) {
|
||||
// If this map inherits from another, we need to start
|
||||
// with its parent's values. Otherwise start out empty.
|
||||
TABLE_NOISY(printf("Creating new bag, entrySize=0x%08x, parent=0x%08x\n",
|
||||
entrySize, parent));
|
||||
if (parent) {
|
||||
const bag_entry* parentBag;
|
||||
uint32_t parentTypeSpecFlags = 0;
|
||||
const ssize_t NP = getBagLocked(parent, &parentBag, &parentTypeSpecFlags);
|
||||
const size_t NT = ((NP >= 0) ? NP : 0) + N;
|
||||
set = (bag_set*)malloc(sizeof(bag_set)+sizeof(bag_entry)*NT);
|
||||
if (set == NULL) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
if (NP > 0) {
|
||||
memcpy(set+1, parentBag, NP*sizeof(bag_entry));
|
||||
set->numAttrs = NP;
|
||||
TABLE_NOISY(LOGI("Initialized new bag with %d inherited attributes.\n", NP));
|
||||
} else {
|
||||
TABLE_NOISY(LOGI("Initialized new bag with no inherited attributes.\n"));
|
||||
set->numAttrs = 0;
|
||||
}
|
||||
set->availAttrs = NT;
|
||||
set->typeSpecFlags = parentTypeSpecFlags;
|
||||
} else {
|
||||
set = (bag_set*)malloc(sizeof(bag_set)+sizeof(bag_entry)*N);
|
||||
if (set == NULL) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
set->numAttrs = 0;
|
||||
set->availAttrs = N;
|
||||
set->typeSpecFlags = 0;
|
||||
// If this map inherits from another, we need to start
|
||||
// with its parent's values. Otherwise start out empty.
|
||||
TABLE_NOISY(printf("Creating new bag, entrySize=0x%08x, parent=0x%08x\n",
|
||||
entrySize, parent));
|
||||
if (parent) {
|
||||
const bag_entry* parentBag;
|
||||
uint32_t parentTypeSpecFlags = 0;
|
||||
const ssize_t NP = getBagLocked(parent, &parentBag, &parentTypeSpecFlags);
|
||||
const size_t NT = ((NP >= 0) ? NP : 0) + N;
|
||||
set = (bag_set*)malloc(sizeof(bag_set)+sizeof(bag_entry)*NT);
|
||||
if (set == NULL) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
if (NP > 0) {
|
||||
memcpy(set+1, parentBag, NP*sizeof(bag_entry));
|
||||
set->numAttrs = NP;
|
||||
TABLE_NOISY(LOGI("Initialized new bag with %d inherited attributes.\n", NP));
|
||||
} else {
|
||||
TABLE_NOISY(LOGI("Initialized new bag with no inherited attributes.\n"));
|
||||
set->numAttrs = 0;
|
||||
}
|
||||
set->availAttrs = NT;
|
||||
set->typeSpecFlags = parentTypeSpecFlags;
|
||||
} else {
|
||||
set = (bag_set*)malloc(sizeof(bag_set)+sizeof(bag_entry)*N);
|
||||
if (set == NULL) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
set->numAttrs = 0;
|
||||
set->availAttrs = N;
|
||||
set->typeSpecFlags = 0;
|
||||
}
|
||||
|
||||
if (typeClass->typeSpecFlags != NULL) {
|
||||
set->typeSpecFlags |= dtohl(typeClass->typeSpecFlags[e]);
|
||||
set->typeSpecFlags |= dtohl(typeClass->typeSpecFlags[E]);
|
||||
} else {
|
||||
set->typeSpecFlags = -1;
|
||||
}
|
||||
|
|
@ -3759,7 +3923,7 @@ ssize_t ResTable::getEntry(
|
|||
}
|
||||
|
||||
status_t ResTable::parsePackage(const ResTable_package* const pkg,
|
||||
const Header* const header)
|
||||
const Header* const header, uint32_t idmap_id)
|
||||
{
|
||||
const uint8_t* base = (const uint8_t*)pkg;
|
||||
status_t err = validate_chunk(&pkg->header, sizeof(*pkg),
|
||||
|
|
@ -3793,8 +3957,12 @@ status_t ResTable::parsePackage(const ResTable_package* const pkg,
|
|||
|
||||
Package* package = NULL;
|
||||
PackageGroup* group = NULL;
|
||||
uint32_t id = dtohl(pkg->id);
|
||||
if (id != 0 && id < 256) {
|
||||
uint32_t id = idmap_id != 0 ? idmap_id : dtohl(pkg->id);
|
||||
// If at this point id == 0, pkg is an overlay package without a
|
||||
// corresponding idmap. During regular usage, overlay packages are
|
||||
// always loaded alongside their idmaps, but during idmap creation
|
||||
// the package is temporarily loaded by itself.
|
||||
if (id < 256) {
|
||||
|
||||
package = new Package(this, header, pkg);
|
||||
if (package == NULL) {
|
||||
|
|
@ -3847,7 +4015,7 @@ status_t ResTable::parsePackage(const ResTable_package* const pkg,
|
|||
return (mError=err);
|
||||
}
|
||||
} else {
|
||||
LOG_ALWAYS_FATAL("Skins not supported!");
|
||||
LOG_ALWAYS_FATAL("Package id out of range");
|
||||
return NO_ERROR;
|
||||
}
|
||||
|
||||
|
|
@ -3998,6 +4166,136 @@ status_t ResTable::parsePackage(const ResTable_package* const pkg,
|
|||
return NO_ERROR;
|
||||
}
|
||||
|
||||
status_t ResTable::createIdmap(const ResTable& overlay, uint32_t originalCrc, uint32_t overlayCrc,
|
||||
void** outData, size_t* outSize) const
|
||||
{
|
||||
// see README for details on the format of map
|
||||
if (mPackageGroups.size() == 0) {
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
if (mPackageGroups[0]->packages.size() == 0) {
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
|
||||
Vector<Vector<uint32_t> > map;
|
||||
const PackageGroup* pg = mPackageGroups[0];
|
||||
const Package* pkg = pg->packages[0];
|
||||
size_t typeCount = pkg->types.size();
|
||||
// starting size is header + first item (number of types in map)
|
||||
*outSize = (IDMAP_HEADER_SIZE + 1) * sizeof(uint32_t);
|
||||
const String16 overlayPackage(overlay.mPackageGroups[0]->packages[0]->package->name);
|
||||
const uint32_t pkg_id = pkg->package->id << 24;
|
||||
|
||||
for (size_t typeIndex = 0; typeIndex < typeCount; ++typeIndex) {
|
||||
ssize_t offset = -1;
|
||||
const Type* typeConfigs = pkg->getType(typeIndex);
|
||||
ssize_t mapIndex = map.add();
|
||||
if (mapIndex < 0) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
Vector<uint32_t>& vector = map.editItemAt(mapIndex);
|
||||
for (size_t entryIndex = 0; entryIndex < typeConfigs->entryCount; ++entryIndex) {
|
||||
uint32_t resID = (0xff000000 & ((pkg->package->id)<<24))
|
||||
| (0x00ff0000 & ((typeIndex+1)<<16))
|
||||
| (0x0000ffff & (entryIndex));
|
||||
resource_name resName;
|
||||
if (!this->getResourceName(resID, &resName)) {
|
||||
return UNKNOWN_ERROR;
|
||||
}
|
||||
|
||||
const String16 overlayType(resName.type, resName.typeLen);
|
||||
const String16 overlayName(resName.name, resName.nameLen);
|
||||
uint32_t overlayResID = overlay.identifierForName(overlayName.string(),
|
||||
overlayName.size(),
|
||||
overlayType.string(),
|
||||
overlayType.size(),
|
||||
overlayPackage.string(),
|
||||
overlayPackage.size());
|
||||
if (overlayResID != 0) {
|
||||
// overlay package has package ID == 0, use original package's ID instead
|
||||
overlayResID |= pkg_id;
|
||||
}
|
||||
vector.push(overlayResID);
|
||||
if (overlayResID != 0 && offset == -1) {
|
||||
offset = Res_GETENTRY(resID);
|
||||
}
|
||||
#if 0
|
||||
if (overlayResID != 0) {
|
||||
LOGD("%s/%s 0x%08x -> 0x%08x\n",
|
||||
String8(String16(resName.type)).string(),
|
||||
String8(String16(resName.name)).string(),
|
||||
resID, overlayResID);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
if (offset != -1) {
|
||||
// shave off leading and trailing entries which lack overlay values
|
||||
vector.removeItemsAt(0, offset);
|
||||
vector.insertAt((uint32_t)offset, 0, 1);
|
||||
while (vector.top() == 0) {
|
||||
vector.pop();
|
||||
}
|
||||
// reserve space for number and offset of entries, and the actual entries
|
||||
*outSize += (2 + vector.size()) * sizeof(uint32_t);
|
||||
} else {
|
||||
// no entries of current type defined in overlay package
|
||||
vector.clear();
|
||||
// reserve space for type offset
|
||||
*outSize += 1 * sizeof(uint32_t);
|
||||
}
|
||||
}
|
||||
|
||||
if ((*outData = malloc(*outSize)) == NULL) {
|
||||
return NO_MEMORY;
|
||||
}
|
||||
uint32_t* data = (uint32_t*)*outData;
|
||||
*data++ = htodl(IDMAP_MAGIC);
|
||||
*data++ = htodl(originalCrc);
|
||||
*data++ = htodl(overlayCrc);
|
||||
const size_t mapSize = map.size();
|
||||
*data++ = htodl(mapSize);
|
||||
size_t offset = mapSize;
|
||||
for (size_t i = 0; i < mapSize; ++i) {
|
||||
const Vector<uint32_t>& vector = map.itemAt(i);
|
||||
const size_t N = vector.size();
|
||||
if (N == 0) {
|
||||
*data++ = htodl(0);
|
||||
} else {
|
||||
offset++;
|
||||
*data++ = htodl(offset);
|
||||
offset += N;
|
||||
}
|
||||
}
|
||||
for (size_t i = 0; i < mapSize; ++i) {
|
||||
const Vector<uint32_t>& vector = map.itemAt(i);
|
||||
const size_t N = vector.size();
|
||||
if (N == 0) {
|
||||
continue;
|
||||
}
|
||||
*data++ = htodl(N - 1); // do not count the offset (which is vector's first element)
|
||||
for (size_t j = 0; j < N; ++j) {
|
||||
const uint32_t& overlayResID = vector.itemAt(j);
|
||||
*data++ = htodl(overlayResID);
|
||||
}
|
||||
}
|
||||
|
||||
return NO_ERROR;
|
||||
}
|
||||
|
||||
bool ResTable::getIdmapInfo(const void* idmap, size_t sizeBytes,
|
||||
uint32_t* pOriginalCrc, uint32_t* pOverlayCrc)
|
||||
{
|
||||
const uint32_t* map = (const uint32_t*)idmap;
|
||||
if (!assertIdmapHeader(map, sizeBytes)) {
|
||||
return false;
|
||||
}
|
||||
*pOriginalCrc = map[1];
|
||||
*pOverlayCrc = map[2];
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
#ifndef HAVE_ANDROID_OS
|
||||
#define CHAR16_TO_CSTR(c16, len) (String8(String16(c16,len)).string())
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue