| /* |
| * Copyright (C) 2019 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 <android-base/file.h> |
| #include <android-base/logging.h> |
| #include <android-base/strings.h> |
| #include <hidl-util/FQName.h> |
| #include <hidl-util/Formatter.h> |
| #include <hidl-util/StringHelper.h> |
| #include <iostream> |
| #include <set> |
| #include <string> |
| #include <vector> |
| |
| #include "AidlHelper.h" |
| #include "ArrayType.h" |
| #include "CompoundType.h" |
| #include "Coordinator.h" |
| #include "Interface.h" |
| #include "Method.h" |
| #include "NamedType.h" |
| #include "Reference.h" |
| #include "Scope.h" |
| |
| namespace android { |
| |
| Formatter* AidlHelper::notesFormatter = nullptr; |
| std::string AidlHelper::fileHeader = ""; |
| bool AidlHelper::expandExtended = false; |
| |
| Formatter& AidlHelper::notes() { |
| CHECK(notesFormatter != nullptr); |
| return *notesFormatter; |
| } |
| |
| void AidlHelper::setNotes(Formatter* formatter) { |
| CHECK(formatter != nullptr); |
| notesFormatter = formatter; |
| } |
| |
| std::string AidlHelper::getAidlName(const FQName& fqName, AidlBackend backend) { |
| std::vector<std::string> names; |
| for (const std::string& name : fqName.names()) { |
| names.push_back(StringHelper::Capitalize(name)); |
| } |
| switch (backend) { |
| case AidlBackend::CPP: |
| /* fall through */ |
| case AidlBackend::NDK: |
| return StringHelper::JoinStrings(names, "::"); |
| case AidlBackend::JAVA: |
| return StringHelper::JoinStrings(names, "."); |
| case AidlBackend::UNKNOWN: |
| /* fall through */ |
| default: |
| return StringHelper::Capitalize(names.back()); |
| } |
| } |
| |
| std::string AidlHelper::getAidlPackage(const FQName& fqName) { |
| std::string aidlPackage = fqName.package(); |
| if (fqName.getPackageMajorVersion() != 1) { |
| aidlPackage += std::to_string(fqName.getPackageMajorVersion()); |
| } |
| |
| return aidlPackage; |
| } |
| |
| std::string AidlHelper::getAidlPackagePath(const FQName& fqName) { |
| return base::Join(base::Split(AidlHelper::getAidlPackage(fqName), "."), "/"); |
| } |
| |
| std::optional<std::string> AidlHelper::getAidlFQName(const FQName& fqName) { |
| std::optional<const ReplacedTypeInfo> type = getAidlReplacedType(fqName); |
| if (type) { |
| return type.value().aidlReplacedFQName; |
| } |
| return getAidlPackage(fqName) + "." + getAidlName(fqName); |
| } |
| |
| const NamedType* AidlHelper::getTopLevelType(const NamedType* type) { |
| if (type->parent() && type->parent()->fqName().hasVersion()) { |
| auto base_type = type->parent(); |
| while (base_type->parent() && base_type->parent()->fqName().hasVersion()) { |
| base_type = base_type->parent(); |
| } |
| return base_type; |
| } else { |
| return type; |
| } |
| } |
| |
| static void importLocallyReferencedType(const Type& scope, const Type& type, |
| std::set<FQName>* imports) { |
| if (type.isArray()) { |
| return importLocallyReferencedType( |
| scope, *static_cast<const ArrayType*>(&type)->getElementType(), imports); |
| } |
| if (type.isTemplatedType()) { |
| return importLocallyReferencedType( |
| scope, *static_cast<const TemplatedType*>(&type)->getElementType(), imports); |
| } |
| |
| if (!type.isNamedType()) return; |
| const NamedType& namedType = *static_cast<const NamedType*>(&type); |
| // If this type has the same top level type as the scope, then it is defined |
| // in the same file and does not need to be imported. |
| if (scope.isNamedType()) { |
| const auto& scopeTopLevel = |
| AidlHelper::getTopLevelType(static_cast<const NamedType*>(&scope)); |
| const auto& thisTopLevel = AidlHelper::getTopLevelType(&namedType); |
| // The fqName might not be equal because of differing HIDL versions for the |
| // top level type. Generated AIDL does not have these differences in |
| // versions, so we can test the equality of the name. |
| if (scopeTopLevel->fqName().name() == thisTopLevel->fqName().name()) return; |
| } |
| imports->insert(namedType.fqName()); |
| } |
| |
| // This tries iterating over the HIDL AST which is a bit messy because |
| // it has to encode the logic in the rest of hidl2aidl. It would be better |
| // if we could iterate over the AIDL structure which has already been |
| // processed. |
| void AidlHelper::emitFileHeader( |
| Formatter& out, const NamedType& type, |
| const std::map<const NamedType*, const ProcessedCompoundType>& processedTypes) { |
| AidlHelper::emitFileHeader(out); |
| out << "package " << getAidlPackage(type.fqName()) << ";\n\n"; |
| |
| std::set<FQName> imports; |
| |
| // Import all the referenced types |
| if (type.isInterface()) { |
| // This is a separate case because getReferences doesn't traverse all the superTypes and |
| // sometimes includes references to types that would not exist on AIDL |
| const std::vector<const Method*>& methods = |
| getUserDefinedMethods(out, static_cast<const Interface&>(type)); |
| for (const Method* method : methods) { |
| for (const Reference<Type>* ref : method->getReferences()) { |
| importLocallyReferencedType(type, *ref->get(), &imports); |
| } |
| } |
| } else if (type.isCompoundType()) { |
| // Get all of the imports for the flattened compound type that may |
| // include additional fields and subtypes from older versions |
| const auto& it = processedTypes.find(&type); |
| CHECK(it != processedTypes.end()) << "Failed to find " << type.fullName(); |
| const ProcessedCompoundType& processedType = it->second; |
| |
| for (const auto& field : processedType.fields) { |
| importLocallyReferencedType(type, *field.field->get(), &imports); |
| } |
| } else { |
| for (const Reference<Type>* ref : type.getReferences()) { |
| if (ref->get()->definedName() == type.fqName().name()) { |
| // Don't import the referenced type if this is referencing itself |
| continue; |
| } |
| importLocallyReferencedType(type, *ref->get(), &imports); |
| } |
| } |
| |
| const FQName& relativeTo = type.fqName(); |
| for (const auto& fqName : imports) { |
| // Import all the defined types since they will now be in a different file. |
| // No need to import types from different packages because they're referenced with FQName. |
| // See AidlHelper::getAidlType() |
| if (getAidlPackage(relativeTo) != getAidlPackage(fqName)) continue; |
| |
| std::optional<std::string> import = AidlHelper::getAidlFQName(fqName); |
| if (import) { |
| out << "import " << import.value() << ";\n"; |
| } |
| } |
| |
| if (imports.size() > 0) { |
| out << "\n"; |
| } |
| } |
| |
| Formatter AidlHelper::getFileWithHeader( |
| const NamedType& namedType, const Coordinator& coordinator, |
| const std::map<const NamedType*, const ProcessedCompoundType>& processedTypes) { |
| Formatter out = |
| coordinator.getFormatter(namedType.fqName(), Coordinator::Location::DIRECT, |
| AidlHelper::getAidlPackagePath(namedType.fqName()) + "/" + |
| getAidlName(namedType.fqName()) + ".aidl"); |
| emitFileHeader(out, namedType, processedTypes); |
| return out; |
| } |
| |
| void AidlHelper::processCompoundType(const CompoundType& compoundType, |
| ProcessedCompoundType* processedType, |
| const std::string& fieldNamePrefix) { |
| // Gather all of the subtypes defined in this type |
| for (const NamedType* subType : compoundType.getSubTypes()) { |
| processedType->subTypes.insert(subType); |
| } |
| std::pair<size_t, size_t> version = compoundType.fqName().hasVersion() |
| ? compoundType.fqName().getVersion() |
| : std::pair<size_t, size_t>{0, 0}; |
| for (const NamedReference<Type>* field : compoundType.getFields()) { |
| // Check for references to another version of itself |
| if (field->get()->typeName() == compoundType.typeName()) { |
| if (AidlHelper::shouldBeExpanded( |
| static_cast<const CompoundType&>(*field->get()).fqName(), |
| compoundType.fqName())) { |
| processCompoundType(static_cast<const CompoundType&>(*field->get()), processedType, |
| fieldNamePrefix + field->name() + "."); |
| } else { |
| // Keep this field as is |
| processedType->fields.push_back({field, fieldNamePrefix + field->name(), version}); |
| } |
| } else { |
| // Handle duplicate field names. Keep only the most recent definitions. |
| auto it = std::find_if(processedType->fields.begin(), processedType->fields.end(), |
| [field](auto& processedField) { |
| return processedField.field->name() == field->name(); |
| }); |
| if (it != processedType->fields.end()) { |
| AidlHelper::notes() |
| << "Found conflicting field name \"" << field->name() |
| << "\" in different versions of " << compoundType.fqName().name() << ". "; |
| |
| if (version.first > it->version.first || |
| (version.first == it->version.first && version.second > it->version.second)) { |
| AidlHelper::notes() |
| << "Keeping " << field->get()->typeName() << " from " << version.first |
| << "." << version.second << " and discarding " |
| << (it->field)->get()->typeName() << " from " << it->version.first |
| << "." << it->version.second << ".\n"; |
| it->fullName = fieldNamePrefix + field->name(); |
| it->field = field; |
| it->version = version; |
| } else { |
| AidlHelper::notes() |
| << "Keeping " << (it->field)->get()->typeName() << " from " |
| << it->version.first << "." << it->version.second << " and discarding " |
| << field->get()->typeName() << " from " << version.first << "." |
| << version.second << ".\n"; |
| } |
| } else { |
| processedType->fields.push_back({field, fieldNamePrefix + field->name(), version}); |
| } |
| } |
| } |
| } |
| |
| void AidlHelper::setFileHeader(const std::string& file) { |
| if (!file.empty()) { |
| if (!android::base::ReadFileToString(file, &fileHeader)) { |
| std::cerr << "ERROR: Failed to find license file: " << file << "\n"; |
| exit(1); |
| } |
| } |
| } |
| |
| void AidlHelper::emitFileHeader(Formatter& out) { |
| if (fileHeader.empty()) { |
| out << "// FIXME: license file, or use the -l option to generate the files with the " |
| "header.\n\n"; |
| } else { |
| out << fileHeader << "\n"; |
| } |
| } |
| |
| bool AidlHelper::shouldBeExpanded(const FQName& a, const FQName& b) { |
| return a.package() == b.package() || expandExtended; |
| } |
| |
| } // namespace android |