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/*
* Copyright (C) 2016 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 "ResourceUtils.h"
#include "ValueVisitor.h"
#include "proto/ProtoHelpers.h"
#include "proto/ProtoSerialize.h"
#include <androidfw/ResourceTypes.h>
namespace aapt {
namespace {
class ReferenceIdToNameVisitor : public ValueVisitor {
public:
using ValueVisitor::visit;
ReferenceIdToNameVisitor(const std::map<ResourceId, ResourceNameRef>* mapping) :
mMapping(mapping) {
assert(mMapping);
}
void visit(Reference* reference) override {
if (!reference->id || !reference->id.value().isValid()) {
return;
}
ResourceId id = reference->id.value();
auto cacheIter = mMapping->find(id);
if (cacheIter != mMapping->end()) {
reference->name = cacheIter->second.toResourceName();
}
}
private:
const std::map<ResourceId, ResourceNameRef>* mMapping;
};
class PackagePbDeserializer {
public:
PackagePbDeserializer(const android::ResStringPool* valuePool,
const android::ResStringPool* sourcePool,
const android::ResStringPool* symbolPool,
const Source& source, IDiagnostics* diag) :
mValuePool(valuePool), mSourcePool(sourcePool), mSymbolPool(symbolPool),
mSource(source), mDiag(diag) {
}
public:
bool deserializeFromPb(const pb::Package& pbPackage, ResourceTable* table) {
Maybe<uint8_t> id;
if (pbPackage.has_package_id()) {
id = static_cast<uint8_t>(pbPackage.package_id());
}
std::map<ResourceId, ResourceNameRef> idIndex;
ResourceTablePackage* pkg = table->createPackage(
util::utf8ToUtf16(pbPackage.package_name()), id);
for (const pb::Type& pbType : pbPackage.types()) {
const ResourceType* resType = parseResourceType(util::utf8ToUtf16(pbType.name()));
if (!resType) {
mDiag->error(DiagMessage(mSource) << "unknown type '" << pbType.name() << "'");
return {};
}
ResourceTableType* type = pkg->findOrCreateType(*resType);
for (const pb::Entry& pbEntry : pbType.entries()) {
ResourceEntry* entry = type->findOrCreateEntry(util::utf8ToUtf16(pbEntry.name()));
// Deserialize the symbol status (public/private with source and comments).
if (pbEntry.has_symbol_status()) {
const pb::SymbolStatus& pbStatus = pbEntry.symbol_status();
if (pbStatus.has_source()) {
deserializeSourceFromPb(pbStatus.source(), *mSourcePool,
&entry->symbolStatus.source);
}
if (pbStatus.has_comment()) {
entry->symbolStatus.comment = util::utf8ToUtf16(pbStatus.comment());
}
SymbolState visibility = deserializeVisibilityFromPb(pbStatus.visibility());
entry->symbolStatus.state = visibility;
if (visibility == SymbolState::kPublic) {
// This is a public symbol, we must encode the ID now if there is one.
if (pbEntry.has_id()) {
entry->id = static_cast<uint16_t>(pbEntry.id());
}
if (type->symbolStatus.state != SymbolState::kPublic) {
// If the type has not been made public, do so now.
type->symbolStatus.state = SymbolState::kPublic;
if (pbType.has_id()) {
type->id = static_cast<uint8_t>(pbType.id());
}
}
} else if (visibility == SymbolState::kPrivate) {
if (type->symbolStatus.state == SymbolState::kUndefined) {
type->symbolStatus.state = SymbolState::kPrivate;
}
}
}
ResourceId resId(pbPackage.package_id(), pbType.id(), pbEntry.id());
if (resId.isValid()) {
idIndex[resId] = ResourceNameRef(pkg->name, type->type, entry->name);
}
for (const pb::ConfigValue& pbConfigValue : pbEntry.config_values()) {
const pb::ConfigDescription& pbConfig = pbConfigValue.config();
ConfigDescription config;
if (!deserializeConfigDescriptionFromPb(pbConfig, &config)) {
mDiag->error(DiagMessage(mSource) << "invalid configuration");
return {};
}
ResourceConfigValue* configValue = entry->findOrCreateValue(config,
pbConfig.product());
if (configValue->value) {
// Duplicate config.
mDiag->error(DiagMessage(mSource) << "duplicate configuration");
return {};
}
configValue->value = deserializeValueFromPb(pbConfigValue.value(),
config, &table->stringPool);
if (!configValue->value) {
return {};
}
}
}
}
ReferenceIdToNameVisitor visitor(&idIndex);
visitAllValuesInPackage(pkg, &visitor);
return true;
}
private:
std::unique_ptr<Item> deserializeItemFromPb(const pb::Item& pbItem,
const ConfigDescription& config,
StringPool* pool) {
if (pbItem.has_ref()) {
const pb::Reference& pbRef = pbItem.ref();
std::unique_ptr<Reference> ref = util::make_unique<Reference>();
if (!deserializeReferenceFromPb(pbRef, ref.get())) {
return {};
}
return std::move(ref);
} else if (pbItem.has_prim()) {
const pb::Primitive& pbPrim = pbItem.prim();
android::Res_value prim = {};
prim.dataType = static_cast<uint8_t>(pbPrim.type());
prim.data = pbPrim.data();
return util::make_unique<BinaryPrimitive>(prim);
} else if (pbItem.has_id()) {
return util::make_unique<Id>();
} else if (pbItem.has_str()) {
const uint32_t idx = pbItem.str().idx();
StringPiece16 str = util::getString(*mValuePool, idx);
const android::ResStringPool_span* spans = mValuePool->styleAt(idx);
if (spans && spans->name.index != android::ResStringPool_span::END) {
StyleString styleStr = { str.toString() };
while (spans->name.index != android::ResStringPool_span::END) {
styleStr.spans.push_back(Span{
util::getString(*mValuePool, spans->name.index).toString(),
spans->firstChar,
spans->lastChar
});
spans++;
}
return util::make_unique<StyledString>(
pool->makeRef(styleStr, StringPool::Context{ 1, config }));
}
return util::make_unique<String>(
pool->makeRef(str, StringPool::Context{ 1, config }));
} else if (pbItem.has_raw_str()) {
const uint32_t idx = pbItem.raw_str().idx();
StringPiece16 str = util::getString(*mValuePool, idx);
return util::make_unique<RawString>(
pool->makeRef(str, StringPool::Context{ 1, config }));
} else if (pbItem.has_file()) {
const uint32_t idx = pbItem.file().path_idx();
StringPiece16 str = util::getString(*mValuePool, idx);
return util::make_unique<FileReference>(
pool->makeRef(str, StringPool::Context{ 0, config }));
} else {
mDiag->error(DiagMessage(mSource) << "unknown item");
}
return {};
}
std::unique_ptr<Value> deserializeValueFromPb(const pb::Value& pbValue,
const ConfigDescription& config,
StringPool* pool) {
const bool isWeak = pbValue.has_weak() ? pbValue.weak() : false;
std::unique_ptr<Value> value;
if (pbValue.has_item()) {
value = deserializeItemFromPb(pbValue.item(), config, pool);
if (!value) {
return {};
}
} else if (pbValue.has_compound_value()) {
const pb::CompoundValue pbCompoundValue = pbValue.compound_value();
if (pbCompoundValue.has_attr()) {
const pb::Attribute& pbAttr = pbCompoundValue.attr();
std::unique_ptr<Attribute> attr = util::make_unique<Attribute>(isWeak);
attr->typeMask = pbAttr.format_flags();
for (const pb::Attribute_Symbol& pbSymbol : pbAttr.symbols()) {
Attribute::Symbol symbol;
deserializeItemCommon(pbSymbol, &symbol.symbol);
if (!deserializeReferenceFromPb(pbSymbol.name(), &symbol.symbol)) {
return {};
}
symbol.value = pbSymbol.value();
attr->symbols.push_back(std::move(symbol));
}
value = std::move(attr);
} else if (pbCompoundValue.has_style()) {
const pb::Style& pbStyle = pbCompoundValue.style();
std::unique_ptr<Style> style = util::make_unique<Style>();
if (pbStyle.has_parent()) {
style->parent = Reference();
if (!deserializeReferenceFromPb(pbStyle.parent(), &style->parent.value())) {
return {};
}
if (pbStyle.has_parent_source()) {
Source parentSource;
deserializeSourceFromPb(pbStyle.parent_source(), *mSourcePool,
&parentSource);
style->parent.value().setSource(std::move(parentSource));
}
}
for (const pb::Style_Entry& pbEntry : pbStyle.entries()) {
Style::Entry entry;
deserializeItemCommon(pbEntry, &entry.key);
if (!deserializeReferenceFromPb(pbEntry.key(), &entry.key)) {
return {};
}
entry.value = deserializeItemFromPb(pbEntry.item(), config, pool);
if (!entry.value) {
return {};
}
deserializeItemCommon(pbEntry, entry.value.get());
style->entries.push_back(std::move(entry));
}
value = std::move(style);
} else if (pbCompoundValue.has_styleable()) {
const pb::Styleable& pbStyleable = pbCompoundValue.styleable();
std::unique_ptr<Styleable> styleable = util::make_unique<Styleable>();
for (const pb::Styleable_Entry& pbEntry : pbStyleable.entries()) {
Reference attrRef;
deserializeItemCommon(pbEntry, &attrRef);
deserializeReferenceFromPb(pbEntry.attr(), &attrRef);
styleable->entries.push_back(std::move(attrRef));
}
value = std::move(styleable);
} else if (pbCompoundValue.has_array()) {
const pb::Array& pbArray = pbCompoundValue.array();
std::unique_ptr<Array> array = util::make_unique<Array>();
for (const pb::Array_Entry& pbEntry : pbArray.entries()) {
std::unique_ptr<Item> item = deserializeItemFromPb(pbEntry.item(), config,
pool);
if (!item) {
return {};
}
deserializeItemCommon(pbEntry, item.get());
array->items.push_back(std::move(item));
}
value = std::move(array);
} else if (pbCompoundValue.has_plural()) {
const pb::Plural& pbPlural = pbCompoundValue.plural();
std::unique_ptr<Plural> plural = util::make_unique<Plural>();
for (const pb::Plural_Entry& pbEntry : pbPlural.entries()) {
size_t pluralIdx = deserializePluralEnumFromPb(pbEntry.arity());
plural->values[pluralIdx] = deserializeItemFromPb(pbEntry.item(), config,
pool);
if (!plural->values[pluralIdx]) {
return {};
}
deserializeItemCommon(pbEntry, plural->values[pluralIdx].get());
}
value = std::move(plural);
} else {
mDiag->error(DiagMessage(mSource) << "unknown compound value");
return {};
}
} else {
mDiag->error(DiagMessage(mSource) << "unknown value");
return {};
}
assert(value && "forgot to set value");
value->setWeak(isWeak);
deserializeItemCommon(pbValue, value.get());
return value;
}
bool deserializeReferenceFromPb(const pb::Reference& pbRef, Reference* outRef) {
outRef->referenceType = deserializeReferenceTypeFromPb(pbRef.type());
outRef->privateReference = pbRef.private_();
if (!pbRef.has_id() && !pbRef.has_symbol_idx()) {
return false;
}
if (pbRef.has_id()) {
outRef->id = ResourceId(pbRef.id());
}
if (pbRef.has_symbol_idx()) {
StringPiece16 strSymbol = util::getString(*mSymbolPool, pbRef.symbol_idx());
ResourceNameRef nameRef;
if (!ResourceUtils::parseResourceName(strSymbol, &nameRef, nullptr)) {
mDiag->error(DiagMessage(mSource) << "invalid reference name '"
<< strSymbol << "'");
return false;
}
outRef->name = nameRef.toResourceName();
}
return true;
}
template <typename T>
void deserializeItemCommon(const T& pbItem, Value* outValue) {
if (pbItem.has_source()) {
Source source;
deserializeSourceFromPb(pbItem.source(), *mSourcePool, &source);
outValue->setSource(std::move(source));
}
if (pbItem.has_comment()) {
outValue->setComment(util::utf8ToUtf16(pbItem.comment()));
}
}
private:
const android::ResStringPool* mValuePool;
const android::ResStringPool* mSourcePool;
const android::ResStringPool* mSymbolPool;
const Source mSource;
IDiagnostics* mDiag;
};
} // namespace
std::unique_ptr<ResourceTable> deserializeTableFromPb(const pb::ResourceTable& pbTable,
const Source& source,
IDiagnostics* diag) {
std::unique_ptr<ResourceTable> table = util::make_unique<ResourceTable>();
if (!pbTable.has_string_pool()) {
diag->error(DiagMessage(source) << "no string pool found");
return {};
}
android::ResStringPool valuePool;
android::status_t result = valuePool.setTo(pbTable.string_pool().data().data(),
pbTable.string_pool().data().size());
if (result != android::NO_ERROR) {
diag->error(DiagMessage(source) << "invalid string pool");
return {};
}
android::ResStringPool sourcePool;
if (pbTable.has_source_pool()) {
result = sourcePool.setTo(pbTable.source_pool().data().data(),
pbTable.source_pool().data().size());
if (result != android::NO_ERROR) {
diag->error(DiagMessage(source) << "invalid source pool");
return {};
}
}
android::ResStringPool symbolPool;
if (pbTable.has_symbol_pool()) {
result = symbolPool.setTo(pbTable.symbol_pool().data().data(),
pbTable.symbol_pool().data().size());
if (result != android::NO_ERROR) {
diag->error(DiagMessage(source) << "invalid symbol pool");
return {};
}
}
PackagePbDeserializer packagePbDeserializer(&valuePool, &sourcePool, &symbolPool, source, diag);
for (const pb::Package& pbPackage : pbTable.packages()) {
if (!packagePbDeserializer.deserializeFromPb(pbPackage, table.get())) {
return {};
}
}
return table;
}
std::unique_ptr<ResourceFile> deserializeCompiledFileFromPb(const pb::CompiledFile& pbFile,
const Source& source,
IDiagnostics* diag) {
std::unique_ptr<ResourceFile> file = util::make_unique<ResourceFile>();
ResourceNameRef nameRef;
// Need to create an lvalue here so that nameRef can point to something real.
std::u16string utf16Name = util::utf8ToUtf16(pbFile.resource_name());
if (!ResourceUtils::parseResourceName(utf16Name, &nameRef)) {
diag->error(DiagMessage(source) << "invalid resource name in compiled file header: "
<< pbFile.resource_name());
return {};
}
file->name = nameRef.toResourceName();
file->source.path = pbFile.source_path();
deserializeConfigDescriptionFromPb(pbFile.config(), &file->config);
for (const pb::CompiledFile_Symbol& pbSymbol : pbFile.exported_symbols()) {
// Need to create an lvalue here so that nameRef can point to something real.
utf16Name = util::utf8ToUtf16(pbSymbol.resource_name());
if (!ResourceUtils::parseResourceName(utf16Name, &nameRef)) {
diag->error(DiagMessage(source) << "invalid resource name for exported symbol in "
"compiled file header: "
<< pbFile.resource_name());
return {};
}
file->exportedSymbols.push_back(
SourcedResourceName{ nameRef.toResourceName(), pbSymbol.line_no() });
}
return file;
}
CompiledFileInputStream::CompiledFileInputStream(const void* data, size_t size) :
mIn(static_cast<const uint8_t*>(data), size), mPbFile(),
mData(static_cast<const uint8_t*>(data)), mSize(size) {
}
const pb::CompiledFile* CompiledFileInputStream::CompiledFile() {
if (!mPbFile) {
std::unique_ptr<pb::CompiledFile> pbFile = util::make_unique<pb::CompiledFile>();
uint64_t pbSize = 0u;
if (!mIn.ReadLittleEndian64(&pbSize)) {
return nullptr;
}
mIn.PushLimit(static_cast<int>(pbSize));
if (!pbFile->ParsePartialFromCodedStream(&mIn)) {
return nullptr;
}
const size_t padding = 4 - (pbSize & 0x03);
const size_t offset = sizeof(uint64_t) + pbSize + padding;
if (offset > mSize) {
return nullptr;
}
mData += offset;
mSize -= offset;
mPbFile = std::move(pbFile);
}
return mPbFile.get();
}
const void* CompiledFileInputStream::data() {
if (!mPbFile) {
if (!CompiledFile()) {
return nullptr;
}
}
return mData;
}
size_t CompiledFileInputStream::size() {
if (!mPbFile) {
if (!CompiledFile()) {
return 0;
}
}
return mSize;
}
} // namespace aapt