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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include <cstdint>
#include <string>
#include <vector>
#include "absl/container/flat_hash_set.h"
#include "absl/strings/string_view.h"
#include "absl/strings/substitute.h"
#include "google/protobuf/compiler/code_generator.h"
#include "google/protobuf/compiler/plugin.h"
#include "google/protobuf/descriptor.h"
#include "upb/mem/arena.hpp"
#include "upb/reflection/def.hpp"
#include "upb_generator/file_layout.h"
#include "upb_generator/plugin.h"
#include "upb_generator/reflection/context.h"
#include "upb_generator/reflection/header.h"
#include "upb_generator/reflection/source.h"
namespace upb {
namespace generator {
namespace reflection {
void GenerateFile(upb::FileDefPtr file, const Options& options,
google::protobuf::compiler::GeneratorContext* context) {
GenerateReflectionHeader(file, options, context);
GenerateReflectionSource(file, options, context);
}
bool ParseOptions(absl::string_view parameter, Options* options,
std::string* error) {
for (const auto& pair : ParseGeneratorParameter(parameter)) {
if (pair.first == "dllexport_decl") {
options->dllexport_decl = pair.second;
} else {
*error = absl::Substitute("Unknown parameter: $0", pair.first);
return false;
}
}
return true;
}
class ReflectionGenerator : public google::protobuf::compiler::CodeGenerator {
bool Generate(const google::protobuf::FileDescriptor* file,
const std::string& parameter,
google::protobuf::compiler::GeneratorContext* generator_context,
std::string* error) const override {
std::vector<const google::protobuf::FileDescriptor*> files{file};
return GenerateAll(files, parameter, generator_context, error);
}
bool GenerateAll(const std::vector<const google::protobuf::FileDescriptor*>& files,
const std::string& parameter,
google::protobuf::compiler::GeneratorContext* generator_context,
std::string* error) const override {
Options options;
if (!ParseOptions(parameter, &options, error)) {
return false;
}
upb::Arena arena;
DefPoolPair pools;
absl::flat_hash_set<std::string> files_seen;
for (const auto* file : files) {
PopulateDefPool(file, &arena, &pools, &files_seen);
upb::FileDefPtr upb_file = pools.GetFile(file->name());
GenerateFile(upb_file, options, generator_context);
}
return true;
}
uint64_t GetSupportedFeatures() const override {
return FEATURE_PROTO3_OPTIONAL | FEATURE_SUPPORTS_EDITIONS;
}
google::protobuf::Edition GetMinimumEdition() const override {
return google::protobuf::Edition::EDITION_PROTO2;
}
google::protobuf::Edition GetMaximumEdition() const override {
return google::protobuf::Edition::EDITION_2023;
}
};
} // namespace reflection
} // namespace generator
} // namespace upb
int main(int argc, char** argv) {
upb::generator::reflection::ReflectionGenerator generator;
return google::protobuf::compiler::PluginMain(argc, argv, &generator);
}
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