blob: 939bcc2a13b3ba4a1308d50c3923d7c769da069c [file] [log] [blame]
/*
* 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 "AST.h"
#include "Coordinator.h"
#include "EnumType.h"
#include "Interface.h"
#include "Method.h"
#include "ScalarType.h"
#include "Scope.h"
#include <algorithm>
#include <hidl-util/Formatter.h>
#include <android-base/logging.h>
#include <string>
#include <vector>
#include <set>
namespace android {
status_t AST::generateCppImpl(const std::string &outputPath) const {
status_t err = generateStubImplHeader(outputPath);
if (err == OK) {
err = generateStubImplSource(outputPath);
}
return err;
}
void AST::generateFetchSymbol(Formatter &out, const std::string& ifaceName) const {
out << "HIDL_FETCH_" << ifaceName;
}
status_t AST::generateStubImplMethod(Formatter &out,
const std::string &className,
const Method *method) const {
// ignore HIDL reserved methods -- implemented in IFoo already.
if (method->isHidlReserved()) {
return OK;
}
method->generateCppSignature(out, className, false /* specifyNamespaces */);
out << " {\n";
out.indent();
out << "// TODO implement\n";
const TypedVar *elidedReturn = method->canElideCallback();
if (elidedReturn == nullptr) {
out << "return Void();\n";
} else {
out << "return "
<< elidedReturn->type().getCppResultType()
<< " {};\n";
}
out.unindent();
out << "}\n\n";
return OK;
}
status_t AST::generateStubImplHeader(const std::string &outputPath) const {
std::string ifaceName;
if (!AST::isInterface(&ifaceName)) {
// types.hal does not get a stub header.
return OK;
}
const Interface *iface = mRootScope->getInterface();
const std::string baseName = iface->getBaseName();
std::string path = outputPath;
path.append(baseName);
path.append(".h");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
const std::string guard = makeHeaderGuard(baseName, false /* indicateGenerated */);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
generateCppPackageInclude(out, mPackage, "I" + baseName);
out << "#include <hidl/MQDescriptor.h>\n";
out << "#include <hidl/Status.h>\n\n";
enterLeaveNamespace(out, true /* enter */);
out << "namespace implementation {\n\n";
// this is namespace aware code and doesn't require post-processing
out.setNamespace("");
std::vector<const Interface *> chain = iface->typeChain();
std::set<const FQName> usedTypes{};
for (auto it = chain.rbegin(); it != chain.rend(); ++it) {
const Interface *superInterface = *it;
superInterface->addNamedTypesToSet(usedTypes);
}
for (const auto &tuple : iface->allMethodsFromRoot()) {
const Method *method = tuple.method();
for(const auto & arg : method->args()) {
arg->type().addNamedTypesToSet(usedTypes);
}
for(const auto & results : method->results()) {
results->type().addNamedTypesToSet(usedTypes);
}
}
std::set<const FQName> topLevelTypes{};
for (const auto &name : usedTypes) {
topLevelTypes.insert(name.getTopLevelType());
}
for (const FQName &name : topLevelTypes) {
out << "using " << name.cppName() << ";\n";
}
out << "using ::android::hardware::hidl_array;\n";
out << "using ::android::hardware::hidl_string;\n";
out << "using ::android::hardware::hidl_vec;\n";
out << "using ::android::hardware::Return;\n";
out << "using ::android::hardware::Void;\n";
out << "using ::android::sp;\n";
out << "\n";
out << "struct "
<< baseName
<< " : public "
<< ifaceName
<< " {\n";
out.indent();
status_t err = generateMethods(out, [&](const Method *method, const Interface *) {
// ignore HIDL reserved methods -- implemented in IFoo already.
if (method->isHidlReserved()) {
return OK;
}
method->generateCppSignature(out, "" /* className */,
false /* specifyNamespaces */);
out << " override;\n";
return OK;
});
if (err != OK) {
return err;
}
out.unindent();
out << "};\n\n";
out << "extern \"C\" "
<< ifaceName
<< "* ";
generateFetchSymbol(out, ifaceName);
out << "(const char* name);\n\n";
out << "} // namespace implementation\n";
enterLeaveNamespace(out, false /* leave */);
out << "\n#endif // " << guard << "\n";
return OK;
}
status_t AST::generateStubImplSource(const std::string &outputPath) const {
std::string ifaceName;
if (!AST::isInterface(&ifaceName)) {
// types.hal does not get a stub header.
return OK;
}
const Interface *iface = mRootScope->getInterface();
const std::string baseName = iface->getBaseName();
std::string path = outputPath;
path.append(baseName);
path.append(".cpp");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
out << "#include \"" << baseName << ".h\"\n\n";
enterLeaveNamespace(out, true /* enter */);
out << "namespace implementation {\n\n";
// this is namespace aware code and doesn't require post-processing
out.setNamespace("");
status_t err = generateMethods(out, [&](const Method *method, const Interface *) {
return generateStubImplMethod(out, baseName, method);
});
out << ifaceName
<< "* ";
generateFetchSymbol(out, ifaceName);
out << "(const char* /* name */) {\n";
out.indent();
out << "return new " << baseName << "();\n";
out.unindent();
out << "}\n\n";
out << "} // namespace implementation\n";
enterLeaveNamespace(out, false /* leave */);
return OK;
}
} // namespace android