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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_FILE_H__
#define GOOGLE_PROTOBUF_COMPILER_CPP_FILE_H__
#include <algorithm>
#include <functional>
#include <memory>
#include <string>
#include <vector>
#include "google/protobuf/stubs/common.h"
#include "google/protobuf/compiler/scc.h"
#include "y_absl/container/flat_hash_map.h"
#include "y_absl/container/flat_hash_set.h"
#include "y_absl/log/absl_check.h"
#include "google/protobuf/compiler/cpp/enum.h"
#include "google/protobuf/compiler/cpp/extension.h"
#include "google/protobuf/compiler/cpp/field.h"
#include "google/protobuf/compiler/cpp/helpers.h"
#include "google/protobuf/compiler/cpp/message.h"
#include "google/protobuf/compiler/cpp/options.h"
#include "google/protobuf/compiler/cpp/service.h"
#include "google/protobuf/descriptor.h"
#include "google/protobuf/io/printer.h"
#include "google/protobuf/port.h"
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
class FileGenerator {
public:
FileGenerator(const FileDescriptor* file, const Options& options);
FileGenerator(const FileGenerator&) = delete;
FileGenerator& operator=(const FileGenerator&) = delete;
~FileGenerator() = default;
// info_path, if non-empty, should be the path (relative to printer's
// output) to the metadata file describing this proto header.
void GenerateProtoHeader(io::Printer* p, y_absl::string_view info_path);
// info_path, if non-empty, should be the path (relative to printer's
// output) to the metadata file describing this PB header.
void GeneratePBHeader(io::Printer* p, y_absl::string_view info_path);
void GenerateSource(io::Printer* p);
// The following member functions are used when the lite_implicit_weak_fields
// option is set. In this mode the code is organized a bit differently to
// promote better linker stripping of unused code. In particular, we generate
// one .cc file per message, one .cc file per extension, and a main pb.cc file
// containing everything else.
int NumMessages() const { return message_generators_.size(); }
int NumExtensions() const { return extension_generators_.size(); }
// Generates the source file for one message.
void GenerateSourceForMessage(int idx, io::Printer* p);
// Generates the source file for one extension.
void GenerateSourceForExtension(int idx, io::Printer* p);
// Generates a source file containing everything except messages and
// extensions.
void GenerateGlobalSource(io::Printer* p);
private:
// Generates a file, setting up the necessary accoutrements that start and
// end the file, calling `cb` in between.
//
// This includes header guards and file-global variables.
void GenerateFile(io::Printer* p, GeneratedFileType file_type,
std::function<void()> cb);
// Shared code between the two header generators.
void GenerateSharedHeaderCode(io::Printer* p);
// Internal type used by GenerateForwardDeclarations (defined in file.cc).
class ForwardDeclarations;
struct CrossFileReferences;
void IncludeFile(y_absl::string_view google3_name, io::Printer* p) {
DoIncludeFile(google3_name, false, p);
}
void IncludeFileAndExport(y_absl::string_view google3_name, io::Printer* p) {
DoIncludeFile(google3_name, true, p);
}
void DoIncludeFile(y_absl::string_view google3_name, bool do_export,
io::Printer* p);
TProtoStringType CreateHeaderInclude(y_absl::string_view basename,
const FileDescriptor* file);
void GetCrossFileReferencesForField(const FieldDescriptor* field,
CrossFileReferences* refs);
void GetCrossFileReferencesForFile(const FileDescriptor* file,
CrossFileReferences* refs);
void GenerateInternalForwardDeclarations(const CrossFileReferences& refs,
io::Printer* p);
void GenerateSourceIncludes(io::Printer* p);
void GenerateSourcePrelude(io::Printer* p);
void GenerateSourceDefaultInstance(int idx, io::Printer* p);
void GenerateInitForSCC(const SCC* scc, const CrossFileReferences& refs,
io::Printer* p);
void GenerateReflectionInitializationCode(io::Printer* p);
// For other imports, generates their forward-declarations.
void GenerateForwardDeclarations(io::Printer* p);
// Generates top or bottom of a header file.
void GenerateTopHeaderGuard(io::Printer* p, GeneratedFileType file_type);
void GenerateBottomHeaderGuard(io::Printer* p, GeneratedFileType file_type);
// Generates #include directives.
void GenerateLibraryIncludes(io::Printer* p);
void GenerateDependencyIncludes(io::Printer* p);
// Generate a pragma to pull in metadata using the given info_path (if
// non-empty). info_path should be relative to printer's output.
void GenerateMetadataPragma(io::Printer* p, y_absl::string_view info_path);
// Generates a couple of different pieces before definitions:
void GenerateGlobalStateFunctionDeclarations(io::Printer* p);
// Generates types for classes.
void GenerateMessageDefinitions(io::Printer* p);
void GenerateEnumDefinitions(io::Printer* p);
// Generates generic service definitions.
void GenerateServiceDefinitions(io::Printer* p);
// Generates extension identifiers.
void GenerateExtensionIdentifiers(io::Printer* p);
// Generates inline function definitions.
void GenerateInlineFunctionDefinitions(io::Printer* p);
void GenerateProto2NamespaceEnumSpecializations(io::Printer* p);
// Sometimes the names we use in a .proto file happen to be defined as
// macros on some platforms (e.g., macro/minor used in plugin.proto are
// defined as macros in sys/types.h on FreeBSD and a few other platforms).
// To make the generated code compile on these platforms, we either have to
// undef the macro for these few platforms, or rename the field name for all
// platforms. Since these names are part of protobuf public API, renaming is
// generally a breaking change so we prefer the #undef approach.
void GenerateMacroUndefs(io::Printer* p);
bool IsDepWeak(const FileDescriptor* dep) const {
if (weak_deps_.count(dep) != 0) {
Y_ABSL_CHECK(!options_.opensource_runtime);
return true;
}
return false;
}
y_absl::flat_hash_set<const FileDescriptor*> weak_deps_;
const FileDescriptor* file_;
Options options_;
MessageSCCAnalyzer scc_analyzer_;
// This member is unused and should be deleted once all old-style variable
// maps are gone.
// TODO(b/245791219)
y_absl::flat_hash_map<y_absl::string_view, TProtoStringType> variables_;
// Contains the post-order walk of all the messages (and child messages) in
// this file. If you need a pre-order walk just reverse iterate.
std::vector<std::unique_ptr<MessageGenerator>> message_generators_;
std::vector<std::unique_ptr<EnumGenerator>> enum_generators_;
std::vector<std::unique_ptr<ServiceGenerator>> service_generators_;
std::vector<std::unique_ptr<ExtensionGenerator>> extension_generators_;
};
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_COMPILER_CPP_FILE_H__
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