| /* |
| * Copyright (C) 2015 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. |
| */ |
| |
| #include "ResourceTable.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <string> |
| #include <tuple> |
| |
| #include "android-base/logging.h" |
| #include "androidfw/ResourceTypes.h" |
| |
| #include "ConfigDescription.h" |
| #include "NameMangler.h" |
| #include "ResourceValues.h" |
| #include "ValueVisitor.h" |
| #include "text/Unicode.h" |
| #include "util/Util.h" |
| |
| using ::aapt::text::IsValidResourceEntryName; |
| using ::android::StringPiece; |
| |
| namespace aapt { |
| |
| static bool less_than_type(const std::unique_ptr<ResourceTableType>& lhs, ResourceType rhs) { |
| return lhs->type < rhs; |
| } |
| |
| template <typename T> |
| static bool less_than_struct_with_name(const std::unique_ptr<T>& lhs, const StringPiece& rhs) { |
| return lhs->name.compare(0, lhs->name.size(), rhs.data(), rhs.size()) < 0; |
| } |
| |
| ResourceTablePackage* ResourceTable::FindPackage(const StringPiece& name) { |
| const auto last = packages.end(); |
| auto iter = std::lower_bound(packages.begin(), last, name, |
| less_than_struct_with_name<ResourceTablePackage>); |
| if (iter != last && name == (*iter)->name) { |
| return iter->get(); |
| } |
| return nullptr; |
| } |
| |
| ResourceTablePackage* ResourceTable::FindPackageById(uint8_t id) { |
| for (auto& package : packages) { |
| if (package->id && package->id.value() == id) { |
| return package.get(); |
| } |
| } |
| return nullptr; |
| } |
| |
| ResourceTablePackage* ResourceTable::CreatePackage(const StringPiece& name, Maybe<uint8_t> id) { |
| ResourceTablePackage* package = FindOrCreatePackage(name); |
| if (id && !package->id) { |
| package->id = id; |
| return package; |
| } |
| |
| if (id && package->id && package->id.value() != id.value()) { |
| return nullptr; |
| } |
| return package; |
| } |
| |
| ResourceTablePackage* ResourceTable::FindOrCreatePackage(const StringPiece& name) { |
| const auto last = packages.end(); |
| auto iter = std::lower_bound(packages.begin(), last, name, |
| less_than_struct_with_name<ResourceTablePackage>); |
| if (iter != last && name == (*iter)->name) { |
| return iter->get(); |
| } |
| |
| std::unique_ptr<ResourceTablePackage> new_package = util::make_unique<ResourceTablePackage>(); |
| new_package->name = name.to_string(); |
| return packages.emplace(iter, std::move(new_package))->get(); |
| } |
| |
| ResourceTableType* ResourceTablePackage::FindType(ResourceType type) { |
| const auto last = types.end(); |
| auto iter = std::lower_bound(types.begin(), last, type, less_than_type); |
| if (iter != last && (*iter)->type == type) { |
| return iter->get(); |
| } |
| return nullptr; |
| } |
| |
| ResourceTableType* ResourceTablePackage::FindOrCreateType(ResourceType type) { |
| const auto last = types.end(); |
| auto iter = std::lower_bound(types.begin(), last, type, less_than_type); |
| if (iter != last && (*iter)->type == type) { |
| return iter->get(); |
| } |
| return types.emplace(iter, new ResourceTableType(type))->get(); |
| } |
| |
| ResourceEntry* ResourceTableType::FindEntry(const StringPiece& name) { |
| const auto last = entries.end(); |
| auto iter = |
| std::lower_bound(entries.begin(), last, name, less_than_struct_with_name<ResourceEntry>); |
| if (iter != last && name == (*iter)->name) { |
| return iter->get(); |
| } |
| return nullptr; |
| } |
| |
| ResourceEntry* ResourceTableType::FindOrCreateEntry(const StringPiece& name) { |
| auto last = entries.end(); |
| auto iter = |
| std::lower_bound(entries.begin(), last, name, less_than_struct_with_name<ResourceEntry>); |
| if (iter != last && name == (*iter)->name) { |
| return iter->get(); |
| } |
| return entries.emplace(iter, new ResourceEntry(name))->get(); |
| } |
| |
| ResourceConfigValue* ResourceEntry::FindValue(const ConfigDescription& config) { |
| return FindValue(config, StringPiece()); |
| } |
| |
| struct ConfigKey { |
| const ConfigDescription* config; |
| const StringPiece& product; |
| }; |
| |
| bool ltConfigKeyRef(const std::unique_ptr<ResourceConfigValue>& lhs, const ConfigKey& rhs) { |
| int cmp = lhs->config.compare(*rhs.config); |
| if (cmp == 0) { |
| cmp = StringPiece(lhs->product).compare(rhs.product); |
| } |
| return cmp < 0; |
| } |
| |
| ResourceConfigValue* ResourceEntry::FindValue(const ConfigDescription& config, |
| const StringPiece& product) { |
| auto iter = |
| std::lower_bound(values.begin(), values.end(), ConfigKey{&config, product}, ltConfigKeyRef); |
| if (iter != values.end()) { |
| ResourceConfigValue* value = iter->get(); |
| if (value->config == config && StringPiece(value->product) == product) { |
| return value; |
| } |
| } |
| return nullptr; |
| } |
| |
| ResourceConfigValue* ResourceEntry::FindOrCreateValue(const ConfigDescription& config, |
| const StringPiece& product) { |
| auto iter = |
| std::lower_bound(values.begin(), values.end(), ConfigKey{&config, product}, ltConfigKeyRef); |
| if (iter != values.end()) { |
| ResourceConfigValue* value = iter->get(); |
| if (value->config == config && StringPiece(value->product) == product) { |
| return value; |
| } |
| } |
| ResourceConfigValue* newValue = |
| values.insert(iter, util::make_unique<ResourceConfigValue>(config, product))->get(); |
| return newValue; |
| } |
| |
| std::vector<ResourceConfigValue*> ResourceEntry::FindAllValues(const ConfigDescription& config) { |
| std::vector<ResourceConfigValue*> results; |
| |
| auto iter = values.begin(); |
| for (; iter != values.end(); ++iter) { |
| ResourceConfigValue* value = iter->get(); |
| if (value->config == config) { |
| results.push_back(value); |
| ++iter; |
| break; |
| } |
| } |
| |
| for (; iter != values.end(); ++iter) { |
| ResourceConfigValue* value = iter->get(); |
| if (value->config == config) { |
| results.push_back(value); |
| } |
| } |
| return results; |
| } |
| |
| std::vector<ResourceConfigValue*> ResourceEntry::FindValuesIf( |
| const std::function<bool(ResourceConfigValue*)>& f) { |
| std::vector<ResourceConfigValue*> results; |
| for (auto& configValue : values) { |
| if (f(configValue.get())) { |
| results.push_back(configValue.get()); |
| } |
| } |
| return results; |
| } |
| |
| /** |
| * The default handler for collisions. |
| * |
| * Typically, a weak value will be overridden by a strong value. An existing |
| * weak |
| * value will not be overridden by an incoming weak value. |
| * |
| * There are some exceptions: |
| * |
| * Attributes: There are two types of Attribute values: USE and DECL. |
| * |
| * USE is anywhere an Attribute is declared without a format, and in a place |
| * that would |
| * be legal to declare if the Attribute already existed. This is typically in a |
| * <declare-styleable> tag. Attributes defined in a <declare-styleable> are also |
| * weak. |
| * |
| * DECL is an absolute declaration of an Attribute and specifies an explicit |
| * format. |
| * |
| * A DECL will override a USE without error. Two DECLs must match in their |
| * format for there to be |
| * no error. |
| */ |
| ResourceTable::CollisionResult ResourceTable::ResolveValueCollision(Value* existing, |
| Value* incoming) { |
| Attribute* existing_attr = ValueCast<Attribute>(existing); |
| Attribute* incoming_attr = ValueCast<Attribute>(incoming); |
| if (!incoming_attr) { |
| if (incoming->IsWeak()) { |
| // We're trying to add a weak resource but a resource |
| // already exists. Keep the existing. |
| return CollisionResult::kKeepOriginal; |
| } else if (existing->IsWeak()) { |
| // Override the weak resource with the new strong resource. |
| return CollisionResult::kTakeNew; |
| } |
| // The existing and incoming values are strong, this is an error |
| // if the values are not both attributes. |
| return CollisionResult::kConflict; |
| } |
| |
| if (!existing_attr) { |
| if (existing->IsWeak()) { |
| // The existing value is not an attribute and it is weak, |
| // so take the incoming attribute value. |
| return CollisionResult::kTakeNew; |
| } |
| // The existing value is not an attribute and it is strong, |
| // so the incoming attribute value is an error. |
| return CollisionResult::kConflict; |
| } |
| |
| CHECK(incoming_attr != nullptr && existing_attr != nullptr); |
| |
| // |
| // Attribute specific handling. At this point we know both |
| // values are attributes. Since we can declare and define |
| // attributes all-over, we do special handling to see |
| // which definition sticks. |
| // |
| if (existing_attr->type_mask == incoming_attr->type_mask) { |
| // The two attributes are both DECLs, but they are plain attributes |
| // with the same formats. |
| // Keep the strongest one. |
| return existing_attr->IsWeak() ? CollisionResult::kTakeNew : CollisionResult::kKeepOriginal; |
| } |
| |
| if (existing_attr->IsWeak() && existing_attr->type_mask == android::ResTable_map::TYPE_ANY) { |
| // Any incoming attribute is better than this. |
| return CollisionResult::kTakeNew; |
| } |
| |
| if (incoming_attr->IsWeak() && incoming_attr->type_mask == android::ResTable_map::TYPE_ANY) { |
| // The incoming attribute may be a USE instead of a DECL. |
| // Keep the existing attribute. |
| return CollisionResult::kKeepOriginal; |
| } |
| return CollisionResult::kConflict; |
| } |
| |
| static StringPiece ValidateName(const StringPiece& name) { |
| if (!IsValidResourceEntryName(name)) { |
| return name; |
| } |
| return {}; |
| } |
| |
| static StringPiece SkipValidateName(const StringPiece& /*name*/) { |
| return {}; |
| } |
| |
| bool ResourceTable::AddResource(const ResourceNameRef& name, |
| const ConfigDescription& config, |
| const StringPiece& product, |
| std::unique_ptr<Value> value, |
| IDiagnostics* diag) { |
| return AddResourceImpl(name, {}, config, product, std::move(value), ValidateName, |
| ResolveValueCollision, diag); |
| } |
| |
| bool ResourceTable::AddResource(const ResourceNameRef& name, |
| const ResourceId& res_id, |
| const ConfigDescription& config, |
| const StringPiece& product, |
| std::unique_ptr<Value> value, |
| IDiagnostics* diag) { |
| return AddResourceImpl(name, res_id, config, product, std::move(value), ValidateName, |
| ResolveValueCollision, diag); |
| } |
| |
| bool ResourceTable::AddFileReference(const ResourceNameRef& name, |
| const ConfigDescription& config, |
| const Source& source, |
| const StringPiece& path, |
| IDiagnostics* diag) { |
| return AddFileReferenceImpl(name, config, source, path, nullptr, ValidateName, diag); |
| } |
| |
| bool ResourceTable::AddFileReferenceAllowMangled( |
| const ResourceNameRef& name, const ConfigDescription& config, |
| const Source& source, const StringPiece& path, io::IFile* file, |
| IDiagnostics* diag) { |
| return AddFileReferenceImpl(name, config, source, path, file, SkipValidateName, diag); |
| } |
| |
| bool ResourceTable::AddFileReferenceImpl(const ResourceNameRef& name, |
| const ConfigDescription& config, const Source& source, |
| const StringPiece& path, io::IFile* file, |
| NameValidator name_validator, IDiagnostics* diag) { |
| std::unique_ptr<FileReference> fileRef = |
| util::make_unique<FileReference>(string_pool.MakeRef(path)); |
| fileRef->SetSource(source); |
| fileRef->file = file; |
| return AddResourceImpl(name, ResourceId{}, config, StringPiece{}, std::move(fileRef), |
| name_validator, ResolveValueCollision, diag); |
| } |
| |
| bool ResourceTable::AddResourceAllowMangled(const ResourceNameRef& name, |
| const ConfigDescription& config, |
| const StringPiece& product, |
| std::unique_ptr<Value> value, |
| IDiagnostics* diag) { |
| return AddResourceImpl(name, ResourceId{}, config, product, std::move(value), SkipValidateName, |
| ResolveValueCollision, diag); |
| } |
| |
| bool ResourceTable::AddResourceAllowMangled(const ResourceNameRef& name, |
| const ResourceId& id, |
| const ConfigDescription& config, |
| const StringPiece& product, |
| std::unique_ptr<Value> value, |
| IDiagnostics* diag) { |
| return AddResourceImpl(name, id, config, product, std::move(value), SkipValidateName, |
| ResolveValueCollision, diag); |
| } |
| |
| bool ResourceTable::AddResourceImpl(const ResourceNameRef& name, const ResourceId& res_id, |
| const ConfigDescription& config, const StringPiece& product, |
| std::unique_ptr<Value> value, NameValidator name_validator, |
| const CollisionResolverFunc& conflictResolver, |
| IDiagnostics* diag) { |
| CHECK(value != nullptr); |
| CHECK(diag != nullptr); |
| |
| const StringPiece bad_char = name_validator(name.entry); |
| if (!bad_char.empty()) { |
| diag->Error(DiagMessage(value->GetSource()) << "resource '" << name |
| << "' has invalid entry name '" << name.entry |
| << "'. Invalid character '" << bad_char << "'"); |
| |
| return false; |
| } |
| |
| ResourceTablePackage* package = FindOrCreatePackage(name.package); |
| if (res_id.is_valid_dynamic() && package->id && package->id.value() != res_id.package_id()) { |
| diag->Error(DiagMessage(value->GetSource()) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but package '" << package->name << "' already has ID " |
| << std::hex << (int)package->id.value() << std::dec); |
| return false; |
| } |
| |
| ResourceTableType* type = package->FindOrCreateType(name.type); |
| if (res_id.is_valid_dynamic() && type->id && type->id.value() != res_id.type_id()) { |
| diag->Error(DiagMessage(value->GetSource()) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but type '" << type->type << "' already has ID " |
| << std::hex << (int)type->id.value() << std::dec); |
| return false; |
| } |
| |
| ResourceEntry* entry = type->FindOrCreateEntry(name.entry); |
| if (res_id.is_valid_dynamic() && entry->id && entry->id.value() != res_id.entry_id()) { |
| diag->Error(DiagMessage(value->GetSource()) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but resource already has ID " |
| << ResourceId(package->id.value(), type->id.value(), |
| entry->id.value())); |
| return false; |
| } |
| |
| ResourceConfigValue* config_value = entry->FindOrCreateValue(config, product); |
| if (!config_value->value) { |
| // Resource does not exist, add it now. |
| config_value->value = std::move(value); |
| |
| } else { |
| switch (conflictResolver(config_value->value.get(), value.get())) { |
| case CollisionResult::kTakeNew: |
| // Take the incoming value. |
| config_value->value = std::move(value); |
| break; |
| |
| case CollisionResult::kConflict: |
| diag->Error(DiagMessage(value->GetSource()) |
| << "duplicate value for resource '" << name << "' " |
| << "with config '" << config << "'"); |
| diag->Error(DiagMessage(config_value->value->GetSource()) |
| << "resource previously defined here"); |
| return false; |
| |
| case CollisionResult::kKeepOriginal: |
| break; |
| } |
| } |
| |
| if (res_id.is_valid_dynamic()) { |
| package->id = res_id.package_id(); |
| type->id = res_id.type_id(); |
| entry->id = res_id.entry_id(); |
| } |
| return true; |
| } |
| |
| bool ResourceTable::SetSymbolState(const ResourceNameRef& name, const ResourceId& res_id, |
| const Symbol& symbol, IDiagnostics* diag) { |
| return SetSymbolStateImpl(name, res_id, symbol, ValidateName, diag); |
| } |
| |
| bool ResourceTable::SetSymbolStateAllowMangled(const ResourceNameRef& name, |
| const ResourceId& res_id, |
| const Symbol& symbol, |
| IDiagnostics* diag) { |
| return SetSymbolStateImpl(name, res_id, symbol, SkipValidateName, diag); |
| } |
| |
| bool ResourceTable::SetSymbolStateImpl(const ResourceNameRef& name, const ResourceId& res_id, |
| const Symbol& symbol, NameValidator name_validator, |
| IDiagnostics* diag) { |
| CHECK(diag != nullptr); |
| |
| const StringPiece bad_char = name_validator(name.entry); |
| if (!bad_char.empty()) { |
| diag->Error(DiagMessage(symbol.source) << "resource '" << name << "' has invalid entry name '" |
| << name.entry << "'. Invalid character '" << bad_char |
| << "'"); |
| return false; |
| } |
| |
| ResourceTablePackage* package = FindOrCreatePackage(name.package); |
| if (res_id.is_valid_dynamic() && package->id && package->id.value() != res_id.package_id()) { |
| diag->Error(DiagMessage(symbol.source) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but package '" << package->name << "' already has ID " |
| << std::hex << (int)package->id.value() << std::dec); |
| return false; |
| } |
| |
| ResourceTableType* type = package->FindOrCreateType(name.type); |
| if (res_id.is_valid_dynamic() && type->id && type->id.value() != res_id.type_id()) { |
| diag->Error(DiagMessage(symbol.source) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but type '" << type->type << "' already has ID " |
| << std::hex << (int)type->id.value() << std::dec); |
| return false; |
| } |
| |
| ResourceEntry* entry = type->FindOrCreateEntry(name.entry); |
| if (res_id.is_valid_dynamic() && entry->id && entry->id.value() != res_id.entry_id()) { |
| diag->Error(DiagMessage(symbol.source) |
| << "trying to add resource '" << name << "' with ID " << res_id |
| << " but resource already has ID " |
| << ResourceId(package->id.value(), type->id.value(), entry->id.value())); |
| return false; |
| } |
| |
| if (res_id.is_valid_dynamic()) { |
| package->id = res_id.package_id(); |
| type->id = res_id.type_id(); |
| entry->id = res_id.entry_id(); |
| } |
| |
| // Only mark the type state as public, it doesn't care about being private. |
| if (symbol.state == SymbolState::kPublic) { |
| type->symbol_status.state = SymbolState::kPublic; |
| } |
| |
| if (symbol.allow_new) { |
| // This symbol can be added as a new resource when merging (if it belongs to an overlay). |
| entry->symbol_status.allow_new = true; |
| } |
| |
| if (symbol.state == SymbolState::kUndefined && |
| entry->symbol_status.state != SymbolState::kUndefined) { |
| // We can't undefine a symbol (remove its visibility). Ignore. |
| return true; |
| } |
| |
| if (symbol.state == SymbolState::kPrivate && |
| entry->symbol_status.state == SymbolState::kPublic) { |
| // We can't downgrade public to private. Ignore. |
| return true; |
| } |
| |
| // This symbol definition takes precedence, replace. |
| entry->symbol_status.state = symbol.state; |
| entry->symbol_status.source = symbol.source; |
| entry->symbol_status.comment = symbol.comment; |
| return true; |
| } |
| |
| Maybe<ResourceTable::SearchResult> ResourceTable::FindResource(const ResourceNameRef& name) { |
| ResourceTablePackage* package = FindPackage(name.package); |
| if (!package) { |
| return {}; |
| } |
| |
| ResourceTableType* type = package->FindType(name.type); |
| if (!type) { |
| return {}; |
| } |
| |
| ResourceEntry* entry = type->FindEntry(name.entry); |
| if (!entry) { |
| return {}; |
| } |
| return SearchResult{package, type, entry}; |
| } |
| |
| } // namespace aapt |
