blob: 6ad2f9c10d229f394addb94cea86394824baa333 [file] [log] [blame]
/*
* 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 "ConfigDescription.h"
#include "Resource.h"
#include "ValueVisitor.h"
#include "process/SymbolTable.h"
#include "util/Comparators.h"
#include "util/Util.h"
#include <androidfw/AssetManager.h>
#include <androidfw/ResourceTypes.h>
namespace aapt {
const ISymbolTable::Symbol* SymbolTableWrapper::findByName(const ResourceName& name) {
if (const std::shared_ptr<Symbol>& s = mCache.get(name)) {
return s.get();
}
Maybe<ResourceTable::SearchResult> result = mTable->findResource(name);
if (!result) {
if (name.type == ResourceType::kAttr) {
// Recurse and try looking up a private attribute.
return findByName(ResourceName(name.package, ResourceType::kAttrPrivate, name.entry));
}
return {};
}
ResourceTable::SearchResult sr = result.value();
// If no ID exists, we treat the symbol as missing. SymbolTables are used to
// find symbols to link.
if (!sr.package->id || !sr.type->id || !sr.entry->id) {
return {};
}
std::shared_ptr<Symbol> symbol = std::make_shared<Symbol>();
symbol->id = ResourceId(sr.package->id.value(), sr.type->id.value(), sr.entry->id.value());
symbol->isPublic = (sr.entry->symbolStatus.state == SymbolState::kPublic);
if (name.type == ResourceType::kAttr || name.type == ResourceType::kAttrPrivate) {
const ConfigDescription kDefaultConfig;
auto iter = std::lower_bound(sr.entry->values.begin(), sr.entry->values.end(),
kDefaultConfig, cmp::lessThanConfig);
if (iter != sr.entry->values.end() && iter->config == kDefaultConfig) {
// This resource has an Attribute.
if (Attribute* attr = valueCast<Attribute>(iter->value.get())) {
symbol->attribute = util::make_unique<Attribute>(*attr);
} else {
return {};
}
}
}
if (name.type == ResourceType::kAttrPrivate) {
// Masquerade this entry as kAttr.
mCache.put(ResourceName(name.package, ResourceType::kAttr, name.entry), symbol);
} else {
mCache.put(name, symbol);
}
return symbol.get();
}
static std::shared_ptr<ISymbolTable::Symbol> lookupAttributeInTable(const android::ResTable& table,
ResourceId id) {
// Try as a bag.
const android::ResTable::bag_entry* entry;
ssize_t count = table.lockBag(id.id, &entry);
if (count < 0) {
table.unlockBag(entry);
return nullptr;
}
// We found a resource.
std::shared_ptr<ISymbolTable::Symbol> s = std::make_shared<ISymbolTable::Symbol>();
s->id = id;
// Check to see if it is an attribute.
for (size_t i = 0; i < (size_t) count; i++) {
if (entry[i].map.name.ident == android::ResTable_map::ATTR_TYPE) {
s->attribute = util::make_unique<Attribute>(false);
s->attribute->typeMask = entry[i].map.value.data;
break;
}
}
if (s->attribute) {
for (size_t i = 0; i < (size_t) count; i++) {
const android::ResTable_map& mapEntry = entry[i].map;
if (Res_INTERNALID(mapEntry.name.ident)) {
switch (mapEntry.name.ident) {
case android::ResTable_map::ATTR_MIN:
s->attribute->minInt = static_cast<int32_t>(mapEntry.value.data);
break;
case android::ResTable_map::ATTR_MAX:
s->attribute->maxInt = static_cast<int32_t>(mapEntry.value.data);
break;
}
continue;
}
android::ResTable::resource_name entryName;
if (!table.getResourceName(mapEntry.name.ident, false, &entryName)) {
table.unlockBag(entry);
return nullptr;
}
const ResourceType* parsedType = parseResourceType(
StringPiece16(entryName.type, entryName.typeLen));
if (!parsedType) {
table.unlockBag(entry);
return nullptr;
}
Attribute::Symbol symbol;
symbol.symbol.name = ResourceName(
StringPiece16(entryName.package, entryName.packageLen),
*parsedType,
StringPiece16(entryName.name, entryName.nameLen));
symbol.symbol.id = ResourceId(mapEntry.name.ident);
symbol.value = mapEntry.value.data;
s->attribute->symbols.push_back(std::move(symbol));
}
}
table.unlockBag(entry);
return s;
}
const ISymbolTable::Symbol* AssetManagerSymbolTableBuilder::AssetManagerSymbolTable::findByName(
const ResourceName& name) {
if (const std::shared_ptr<Symbol>& s = mCache.get(name)) {
return s.get();
}
for (const auto& asset : mAssets) {
const android::ResTable& table = asset->getResources(false);
StringPiece16 typeStr = toString(name.type);
uint32_t typeSpecFlags = 0;
ResourceId resId = table.identifierForName(name.entry.data(), name.entry.size(),
typeStr.data(), typeStr.size(),
name.package.data(), name.package.size(),
&typeSpecFlags);
if (!resId.isValid()) {
continue;
}
std::shared_ptr<Symbol> s;
if (name.type == ResourceType::kAttr) {
s = lookupAttributeInTable(table, resId);
} else {
s = std::make_shared<Symbol>();
s->id = resId;
}
if (s) {
s->isPublic = (typeSpecFlags & android::ResTable_typeSpec::SPEC_PUBLIC) != 0;
mCache.put(name, s);
return s.get();
}
}
return nullptr;
}
static Maybe<ResourceName> getResourceName(const android::ResTable& table, ResourceId id) {
android::ResTable::resource_name resName;
if (!table.getResourceName(id.id, true, &resName)) {
return {};
}
ResourceName name;
if (resName.package) {
name.package = StringPiece16(resName.package, resName.packageLen).toString();
}
const ResourceType* type;
if (resName.type) {
type = parseResourceType(StringPiece16(resName.type, resName.typeLen));
} else if (resName.type8) {
type = parseResourceType(util::utf8ToUtf16(StringPiece(resName.type8, resName.typeLen)));
} else {
return {};
}
if (!type) {
return {};
}
name.type = *type;
if (resName.name) {
name.entry = StringPiece16(resName.name, resName.nameLen).toString();
} else if (resName.name8) {
name.entry = util::utf8ToUtf16(StringPiece(resName.name8, resName.nameLen));
} else {
return {};
}
return name;
}
const ISymbolTable::Symbol* AssetManagerSymbolTableBuilder::AssetManagerSymbolTable::findById(
ResourceId id) {
if (const std::shared_ptr<Symbol>& s = mIdCache.get(id)) {
return s.get();
}
for (const auto& asset : mAssets) {
const android::ResTable& table = asset->getResources(false);
Maybe<ResourceName> maybeName = getResourceName(table, id);
if (!maybeName) {
continue;
}
uint32_t typeSpecFlags = 0;
table.getResourceFlags(id.id, &typeSpecFlags);
std::shared_ptr<Symbol> s;
if (maybeName.value().type == ResourceType::kAttr) {
s = lookupAttributeInTable(table, id);
} else {
s = std::make_shared<Symbol>();
s->id = id;
}
if (s) {
s->isPublic = (typeSpecFlags & android::ResTable_typeSpec::SPEC_PUBLIC) != 0;
mIdCache.put(id, s);
return s.get();
}
}
return nullptr;
}
const ISymbolTable::Symbol* JoinedSymbolTableBuilder::JoinedSymbolTable::findByName(
const ResourceName& name) {
for (auto& symbolTable : mSymbolTables) {
if (const Symbol* s = symbolTable->findByName(name)) {
return s;
}
}
return {};
}
const ISymbolTable::Symbol* JoinedSymbolTableBuilder::JoinedSymbolTable::findById(ResourceId id) {
for (auto& symbolTable : mSymbolTables) {
if (const Symbol* s = symbolTable->findById(id)) {
return s;
}
}
return {};
}
} // namespace aapt