hpb_generator/protoc-gen-upb-protos.cc - third_party/protobuf - Git at Google

 // 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 <memory>
 #include <string>
 #include <utility>
 #include <vector>

 #include "google/protobuf/descriptor.pb.h"
 #include "google/protobuf/compiler/code_generator.h"
 #include "google/protobuf/compiler/hpb/gen_enums.h"
 #include "google/protobuf/compiler/hpb/gen_extensions.h"
 #include "google/protobuf/compiler/hpb/gen_messages.h"
 #include "google/protobuf/compiler/hpb/gen_utils.h"
 #include "google/protobuf/compiler/hpb/names.h"
 #include "google/protobuf/compiler/hpb/output.h"
 #include "google/protobuf/compiler/plugin.h"
 #include "google/protobuf/descriptor.h"

 namespace google::protobuf::hpb_generator {
 namespace {

 namespace protoc = ::google::protobuf::compiler;
 namespace protobuf = ::proto2;
 using FileDescriptor = ::google::protobuf::FileDescriptor;
 using google::protobuf::Edition;

 void WriteSource(const protobuf::FileDescriptor* file, Output& output,
                  bool fasttable_enabled, bool strip_feature_includes);
 void WriteHeader(const protobuf::FileDescriptor* file, Output& output,
                  bool strip_feature_includes);
 void WriteForwardingHeader(const protobuf::FileDescriptor* file,
                            Output& output);
 void WriteMessageImplementations(const protobuf::FileDescriptor* file,
                                  Output& output);
 void WriteTypedefForwardingHeader(
     const protobuf::FileDescriptor* file,
     const std::vector<const protobuf::Descriptor*>& file_messages,
     Output& output);
 void WriteHeaderMessageForwardDecls(const protobuf::FileDescriptor* file,
                                     Output& output,
                                     bool strip_feature_includes);

 class Generator : public protoc::CodeGenerator {
  public:
   ~Generator() override = default;
   bool Generate(const protobuf::FileDescriptor* file,
                 const std::string& parameter, protoc::GeneratorContext* context,
                 std::string* error) const override;
   uint64_t GetSupportedFeatures() const override {
     return Feature::FEATURE_PROTO3_OPTIONAL |
            Feature::FEATURE_SUPPORTS_EDITIONS;
   }
   Edition GetMinimumEdition() const override { return Edition::EDITION_PROTO2; }
   Edition GetMaximumEdition() const override { return Edition::EDITION_2023; }
 };

 bool Generator::Generate(const protobuf::FileDescriptor* file,
                          const std::string& parameter,
                          protoc::GeneratorContext* context,
                          std::string* error) const {
   bool fasttable_enabled = false;
   bool strip_nonfunctional_codegen = false;
   std::vector<std::pair<std::string, std::string>> params;
   google::protobuf::compiler::ParseGeneratorParameter(parameter, &params);

   for (const auto& pair : params) {
     if (pair.first == "fasttable") {
       fasttable_enabled = true;
     } else if (pair.first == "experimental_strip_nonfunctional_codegen") {
       strip_nonfunctional_codegen = true;
     } else {
       *error = "Unknown parameter: " + pair.first;
       return false;
     }
   }

   // Write model.upb.fwd.h
   std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> output_stream(
       context->Open(ForwardingHeaderFilename(file)));
   Output forwarding_header_output(output_stream.get());
   WriteForwardingHeader(file, forwarding_header_output);

   // Write model.upb.proto.h
   std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> header_output_stream(
       context->Open(CppHeaderFilename(file)));
   Output header_output(header_output_stream.get());
   WriteHeader(file, header_output, strip_nonfunctional_codegen);

   // Write model.upb.proto.cc
   std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> cc_output_stream(
       context->Open(CppSourceFilename(file)));
   Output cc_output(cc_output_stream.get());
   WriteSource(file, cc_output, fasttable_enabled, strip_nonfunctional_codegen);
   return true;
 }

 // The forwarding header defines Access/Proxy/CProxy for message classes
 // used to include when referencing dependencies to prevent transitive
 // dependency headers from being included.
 void WriteForwardingHeader(const protobuf::FileDescriptor* file,
                            Output& output) {
   EmitFileWarning(file, output);
   output(
       R"cc(
 #ifndef $0_UPB_FWD_H_
 #define $0_UPB_FWD_H_
       )cc",
       ToPreproc(file->name()));
   output("\n");
   for (int i = 0; i < file->public_dependency_count(); ++i) {
     output("#include \"$0\"\n",
            ForwardingHeaderFilename(file->public_dependency(i)));
   }
   if (file->public_dependency_count() > 0) {
     output("\n");
   }
   const std::vector<const protobuf::Descriptor*> this_file_messages =
       SortedMessages(file);
   WriteTypedefForwardingHeader(file, this_file_messages, output);
   output("#endif  /* $0_UPB_FWD_H_ */\n", ToPreproc(file->name()));
 }

 void WriteHeader(const protobuf::FileDescriptor* file, Output& output,
                  bool strip_feature_includes) {
   EmitFileWarning(file, output);
   output(
       R"cc(
 #ifndef $0_HPB_PROTO_H_
 #define $0_HPB_PROTO_H_

 #include "absl/status/statusor.h"
 #include "absl/strings/string_view.h"

 #include "google/protobuf/hpb/repeated_field.h"
       )cc",
       ToPreproc(file->name()));

   // Import headers for proto public dependencies.
   for (int i = 0; i < file->public_dependency_count(); i++) {
     if (i == 0) {
       output("// Public Imports.\n");
     }
     output("#include \"$0\"\n", CppHeaderFilename(file->public_dependency(i)));
     if (i == file->public_dependency_count() - 1) {
       output("\n");
     }
   }

   output("#include \"upb/port/def.inc\"\n");

   const std::vector<const protobuf::Descriptor*> this_file_messages =
       SortedMessages(file);
   const std::vector<const protobuf::FieldDescriptor*> this_file_exts =
       SortedExtensions(file);

   if (!this_file_messages.empty()) {
     output("\n");
   }

   WriteHeaderMessageForwardDecls(file, output, strip_feature_includes);
   WriteStartNamespace(file, output);

   std::vector<const protobuf::EnumDescriptor*> this_file_enums =
       SortedEnums(file);

   // Write Class and Enums.
   WriteEnumDeclarations(this_file_enums, output);
   output("\n");

   for (auto message : this_file_messages) {
     WriteMessageClassDeclarations(message, this_file_exts, this_file_enums,
                                   output);
   }
   output("\n");

   WriteExtensionIdentifiersHeader(this_file_exts, output);
   output("\n");

   WriteEndNamespace(file, output);

   output("\n#include \"upb/port/undef.inc\"\n\n");
   // End of "C" section.

   output("#endif  /* $0_HPB_PROTO_H_ */\n", ToPreproc(file->name()));
 }

 // Writes a .upb.cc source file.
 void WriteSource(const protobuf::FileDescriptor* file, Output& output,
                  bool fasttable_enabled, bool strip_feature_includes) {
   EmitFileWarning(file, output);

   output(
       R"cc(
 #include <stddef.h>
 #include "absl/strings/string_view.h"
 #include "$0"
       )cc",
       CppHeaderFilename(file));

   for (int i = 0; i < file->dependency_count(); i++) {
     if (strip_feature_includes &&
         compiler::IsKnownFeatureProto(file->dependency(i)->name())) {
       // Strip feature imports for editions codegen tests.
       continue;
     }
     output("#include \"$0\"\n", CppHeaderFilename(file->dependency(i)));
   }
   output("#include \"upb/port/def.inc\"\n");

   WriteStartNamespace(file, output);
   WriteMessageImplementations(file, output);
   const std::vector<const protobuf::FieldDescriptor*> this_file_exts =
       SortedExtensions(file);
   WriteExtensionIdentifiers(this_file_exts, output);
   WriteEndNamespace(file, output);

   output("#include \"upb/port/undef.inc\"\n\n");
 }

 void WriteMessageImplementations(const protobuf::FileDescriptor* file,
                                  Output& output) {
   const std::vector<const protobuf::FieldDescriptor*> file_exts =
       SortedExtensions(file);
   const std::vector<const protobuf::Descriptor*> this_file_messages =
       SortedMessages(file);
   for (auto message : this_file_messages) {
     WriteMessageImplementation(message, file_exts, output);
   }
 }

 void WriteTypedefForwardingHeader(
     const protobuf::FileDescriptor* file,
     const std::vector<const protobuf::Descriptor*>& file_messages,
     Output& output) {
   WriteStartNamespace(file, output);

   // Forward-declare types defined in this file.
   for (auto message : file_messages) {
     output(
         R"cc(
           class $0;
           namespace internal {
           class $0Access;
           class $0Proxy;
           class $0CProxy;
           }  // namespace internal
         )cc",
         ClassName(message));
   }
   output("\n");
   WriteEndNamespace(file, output);
 }

 /// Writes includes for upb C minitables and fwd.h for transitive typedefs.
 void WriteHeaderMessageForwardDecls(const protobuf::FileDescriptor* file,
                                     Output& output,
                                     bool strip_feature_includes) {
   // Import forward-declaration of types defined in this file.
   output("#include \"$0\"\n", UpbCFilename(file));
   output("#include \"$0\"\n", ForwardingHeaderFilename(file));
   // Import forward-declaration of types in dependencies.
   for (int i = 0; i < file->dependency_count(); ++i) {
     if (strip_feature_includes &&
         compiler::IsKnownFeatureProto(file->dependency(i)->name())) {
       // Strip feature imports for editions codegen tests.
       continue;
     }
     output("#include \"$0\"\n", ForwardingHeaderFilename(file->dependency(i)));
   }
   output("\n");
 }

 }  // namespace
 }  // namespace protobuf
 }  // namespace google::hpb_generator

 int main(int argc, char** argv) {
   google::protobuf::hpb_generator::Generator generator_cc;
   return google::protobuf::compiler::PluginMain(argc, argv, &generator_cc);
 }
	// 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 <memory>
	#include <string>
	#include <utility>
	#include <vector>

	#include "google/protobuf/descriptor.pb.h"
	#include "google/protobuf/compiler/code_generator.h"
	#include "google/protobuf/compiler/hpb/gen_enums.h"
	#include "google/protobuf/compiler/hpb/gen_extensions.h"
	#include "google/protobuf/compiler/hpb/gen_messages.h"
	#include "google/protobuf/compiler/hpb/gen_utils.h"
	#include "google/protobuf/compiler/hpb/names.h"
	#include "google/protobuf/compiler/hpb/output.h"
	#include "google/protobuf/compiler/plugin.h"
	#include "google/protobuf/descriptor.h"

	namespace google::protobuf::hpb_generator {
	namespace {

	namespace protoc = ::google::protobuf::compiler;
	namespace protobuf = ::proto2;
	using FileDescriptor = ::google::protobuf::FileDescriptor;
	using google::protobuf::Edition;

	void WriteSource(const protobuf::FileDescriptor* file, Output& output,
	bool fasttable_enabled, bool strip_feature_includes);
	void WriteHeader(const protobuf::FileDescriptor* file, Output& output,
	bool strip_feature_includes);
	void WriteForwardingHeader(const protobuf::FileDescriptor* file,
	Output& output);
	void WriteMessageImplementations(const protobuf::FileDescriptor* file,
	Output& output);
	void WriteTypedefForwardingHeader(
	const protobuf::FileDescriptor* file,
	const std::vector<const protobuf::Descriptor*>& file_messages,
	Output& output);
	void WriteHeaderMessageForwardDecls(const protobuf::FileDescriptor* file,
	Output& output,
	bool strip_feature_includes);

	class Generator : public protoc::CodeGenerator {
	public:
	~Generator() override = default;
	bool Generate(const protobuf::FileDescriptor* file,
	const std::string& parameter, protoc::GeneratorContext* context,
	std::string* error) const override;
	uint64_t GetSupportedFeatures() const override {
	return Feature::FEATURE_PROTO3_OPTIONAL \|
	Feature::FEATURE_SUPPORTS_EDITIONS;
	}
	Edition GetMinimumEdition() const override { return Edition::EDITION_PROTO2; }
	Edition GetMaximumEdition() const override { return Edition::EDITION_2023; }
	};

	bool Generator::Generate(const protobuf::FileDescriptor* file,
	const std::string& parameter,
	protoc::GeneratorContext* context,
	std::string* error) const {
	bool fasttable_enabled = false;
	bool strip_nonfunctional_codegen = false;
	std::vector<std::pair<std::string, std::string>> params;
	google::protobuf::compiler::ParseGeneratorParameter(parameter, &params);

	for (const auto& pair : params) {
	if (pair.first == "fasttable") {
	fasttable_enabled = true;
	} else if (pair.first == "experimental_strip_nonfunctional_codegen") {
	strip_nonfunctional_codegen = true;
	} else {
	*error = "Unknown parameter: " + pair.first;
	return false;
	}
	}

	// Write model.upb.fwd.h
	std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> output_stream(
	context->Open(ForwardingHeaderFilename(file)));
	Output forwarding_header_output(output_stream.get());
	WriteForwardingHeader(file, forwarding_header_output);

	// Write model.upb.proto.h
	std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> header_output_stream(
	context->Open(CppHeaderFilename(file)));
	Output header_output(header_output_stream.get());
	WriteHeader(file, header_output, strip_nonfunctional_codegen);

	// Write model.upb.proto.cc
	std::unique_ptr<google::protobuf::io::ZeroCopyOutputStream> cc_output_stream(
	context->Open(CppSourceFilename(file)));
	Output cc_output(cc_output_stream.get());
	WriteSource(file, cc_output, fasttable_enabled, strip_nonfunctional_codegen);
	return true;
	}

	// The forwarding header defines Access/Proxy/CProxy for message classes
	// used to include when referencing dependencies to prevent transitive
	// dependency headers from being included.
	void WriteForwardingHeader(const protobuf::FileDescriptor* file,
	Output& output) {
	EmitFileWarning(file, output);
	output(
	R"cc(
	#ifndef $0_UPB_FWD_H_
	#define $0_UPB_FWD_H_
	)cc",
	ToPreproc(file->name()));
	output("\n");
	for (int i = 0; i < file->public_dependency_count(); ++i) {
	output("#include \"$0\"\n",
	ForwardingHeaderFilename(file->public_dependency(i)));
	}
	if (file->public_dependency_count() > 0) {
	output("\n");
	}
	const std::vector<const protobuf::Descriptor*> this_file_messages =
	SortedMessages(file);
	WriteTypedefForwardingHeader(file, this_file_messages, output);
	output("#endif /* $0_UPB_FWD_H_ */\n", ToPreproc(file->name()));
	}

	void WriteHeader(const protobuf::FileDescriptor* file, Output& output,
	bool strip_feature_includes) {
	EmitFileWarning(file, output);
	output(
	R"cc(
	#ifndef $0_HPB_PROTO_H_
	#define $0_HPB_PROTO_H_

	#include "absl/status/statusor.h"
	#include "absl/strings/string_view.h"

	#include "google/protobuf/hpb/repeated_field.h"
	)cc",
	ToPreproc(file->name()));

	// Import headers for proto public dependencies.
	for (int i = 0; i < file->public_dependency_count(); i++) {
	if (i == 0) {
	output("// Public Imports.\n");
	}
	output("#include \"$0\"\n", CppHeaderFilename(file->public_dependency(i)));
	if (i == file->public_dependency_count() - 1) {
	output("\n");
	}
	}

	output("#include \"upb/port/def.inc\"\n");

	const std::vector<const protobuf::Descriptor*> this_file_messages =
	SortedMessages(file);
	const std::vector<const protobuf::FieldDescriptor*> this_file_exts =
	SortedExtensions(file);

	if (!this_file_messages.empty()) {
	output("\n");
	}

	WriteHeaderMessageForwardDecls(file, output, strip_feature_includes);
	WriteStartNamespace(file, output);

	std::vector<const protobuf::EnumDescriptor*> this_file_enums =
	SortedEnums(file);

	// Write Class and Enums.
	WriteEnumDeclarations(this_file_enums, output);
	output("\n");

	for (auto message : this_file_messages) {
	WriteMessageClassDeclarations(message, this_file_exts, this_file_enums,
	output);
	}
	output("\n");

	WriteExtensionIdentifiersHeader(this_file_exts, output);
	output("\n");

	WriteEndNamespace(file, output);

	output("\n#include \"upb/port/undef.inc\"\n\n");
	// End of "C" section.

	output("#endif /* $0_HPB_PROTO_H_ */\n", ToPreproc(file->name()));
	}

	// Writes a .upb.cc source file.
	void WriteSource(const protobuf::FileDescriptor* file, Output& output,
	bool fasttable_enabled, bool strip_feature_includes) {
	EmitFileWarning(file, output);

	output(
	R"cc(
	#include <stddef.h>
	#include "absl/strings/string_view.h"
	#include "$0"
	)cc",
	CppHeaderFilename(file));

	for (int i = 0; i < file->dependency_count(); i++) {
	if (strip_feature_includes &&
	compiler::IsKnownFeatureProto(file->dependency(i)->name())) {
	// Strip feature imports for editions codegen tests.
	continue;
	}
	output("#include \"$0\"\n", CppHeaderFilename(file->dependency(i)));
	}
	output("#include \"upb/port/def.inc\"\n");

	WriteStartNamespace(file, output);
	WriteMessageImplementations(file, output);
	const std::vector<const protobuf::FieldDescriptor*> this_file_exts =
	SortedExtensions(file);
	WriteExtensionIdentifiers(this_file_exts, output);
	WriteEndNamespace(file, output);

	output("#include \"upb/port/undef.inc\"\n\n");
	}

	void WriteMessageImplementations(const protobuf::FileDescriptor* file,
	Output& output) {
	const std::vector<const protobuf::FieldDescriptor*> file_exts =
	SortedExtensions(file);
	const std::vector<const protobuf::Descriptor*> this_file_messages =
	SortedMessages(file);
	for (auto message : this_file_messages) {
	WriteMessageImplementation(message, file_exts, output);
	}
	}

	void WriteTypedefForwardingHeader(
	const protobuf::FileDescriptor* file,
	const std::vector<const protobuf::Descriptor*>& file_messages,
	Output& output) {
	WriteStartNamespace(file, output);

	// Forward-declare types defined in this file.
	for (auto message : file_messages) {
	output(
	R"cc(
	class $0;
	namespace internal {
	class $0Access;
	class $0Proxy;
	class $0CProxy;
	} // namespace internal
	)cc",
	ClassName(message));
	}
	output("\n");
	WriteEndNamespace(file, output);
	}

	/// Writes includes for upb C minitables and fwd.h for transitive typedefs.
	void WriteHeaderMessageForwardDecls(const protobuf::FileDescriptor* file,
	Output& output,
	bool strip_feature_includes) {
	// Import forward-declaration of types defined in this file.
	output("#include \"$0\"\n", UpbCFilename(file));
	output("#include \"$0\"\n", ForwardingHeaderFilename(file));
	// Import forward-declaration of types in dependencies.
	for (int i = 0; i < file->dependency_count(); ++i) {
	if (strip_feature_includes &&
	compiler::IsKnownFeatureProto(file->dependency(i)->name())) {
	// Strip feature imports for editions codegen tests.
	continue;
	}
	output("#include \"$0\"\n", ForwardingHeaderFilename(file->dependency(i)));
	}
	output("\n");
	}

	} // namespace
	} // namespace protobuf
	} // namespace google::hpb_generator

	int main(int argc, char** argv) {
	google::protobuf::hpb_generator::Generator generator_cc;
	return google::protobuf::compiler::PluginMain(argc, argv, &generator_cc);
	}