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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_MESSAGE_H__
#define GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__
#include <cstdint>
#include <memory>
#include <set>
#include <string>
#include <google/protobuf/compiler/cpp/cpp_field.h>
#include <google/protobuf/compiler/cpp/cpp_helpers.h>
#include <google/protobuf/compiler/cpp/cpp_message_layout_helper.h>
#include <google/protobuf/compiler/cpp/cpp_options.h>
#include <google/protobuf/compiler/cpp/cpp_parse_function_generator.h>
namespace google {
namespace protobuf {
namespace io {
class Printer; // printer.h
}
} // namespace protobuf
} // namespace google
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
class EnumGenerator; // enum.h
class ExtensionGenerator; // extension.h
class MessageGenerator {
public:
// See generator.cc for the meaning of dllexport_decl.
MessageGenerator(const Descriptor* descriptor,
const std::map<TProtoStringType, TProtoStringType>& vars,
int index_in_file_messages, const Options& options,
MessageSCCAnalyzer* scc_analyzer);
~MessageGenerator();
// Append the two types of nested generators to the corresponding vector.
void AddGenerators(
std::vector<std::unique_ptr<EnumGenerator>>* enum_generators,
std::vector<std::unique_ptr<ExtensionGenerator>>* extension_generators);
// Generate definitions for this class and all its nested types.
void GenerateClassDefinition(io::Printer* printer);
// Generate definitions of inline methods (placed at the end of the header
// file).
void GenerateInlineMethods(io::Printer* printer);
// Source file stuff.
// Generate all non-inline methods for this class.
void GenerateClassMethods(io::Printer* printer);
// Generate source file code that should go outside any namespace.
void GenerateSourceInProto2Namespace(io::Printer* printer);
private:
// Generate declarations and definitions of accessors for fields.
void GenerateFieldAccessorDeclarations(io::Printer* printer);
void GenerateFieldAccessorDefinitions(io::Printer* printer);
// Generate the table-driven parsing array. Returns the number of entries
// generated.
size_t GenerateParseOffsets(io::Printer* printer);
size_t GenerateParseAuxTable(io::Printer* printer);
// Generates a ParseTable entry. Returns whether the proto uses
// table-driven parsing.
bool GenerateParseTable(io::Printer* printer, size_t offset,
size_t aux_offset);
// Generate the field offsets array. Returns the a pair of the total number
// of entries generated and the index of the first has_bit entry.
std::pair<size_t, size_t> GenerateOffsets(io::Printer* printer);
void GenerateSchema(io::Printer* printer, int offset, int has_offset);
// For each field generates a table entry describing the field for the
// table driven serializer.
int GenerateFieldMetadata(io::Printer* printer);
// Generate constructors and destructor.
void GenerateStructors(io::Printer* printer);
// The compiler typically generates multiple copies of each constructor and
// destructor: http://gcc.gnu.org/bugs.html#nonbugs_cxx
// Placing common code in a separate method reduces the generated code size.
//
// Generate the shared constructor code.
void GenerateSharedConstructorCode(io::Printer* printer);
// Generate the shared destructor code.
void GenerateSharedDestructorCode(io::Printer* printer);
// Generate the arena-specific destructor code.
void GenerateArenaDestructorCode(io::Printer* printer);
// Generate the constexpr constructor for constant initialization of the
// default instance.
void GenerateConstexprConstructor(io::Printer* printer);
// Generate standard Message methods.
void GenerateClear(io::Printer* printer);
void GenerateOneofClear(io::Printer* printer);
void GenerateSerializeWithCachedSizes(io::Printer* printer);
void GenerateSerializeWithCachedSizesToArray(io::Printer* printer);
void GenerateSerializeWithCachedSizesBody(io::Printer* printer);
void GenerateSerializeWithCachedSizesBodyShuffled(io::Printer* printer);
void GenerateByteSize(io::Printer* printer);
void GenerateMergeFrom(io::Printer* printer);
void GenerateClassSpecificMergeFrom(io::Printer* printer);
void GenerateCopyFrom(io::Printer* printer);
void GenerateSwap(io::Printer* printer);
void GenerateIsInitialized(io::Printer* printer);
// Helpers for GenerateSerializeWithCachedSizes().
//
// cached_has_bit_index maintains that:
// cached_has_bits = _has_bits_[cached_has_bit_index]
// for cached_has_bit_index >= 0
void GenerateSerializeOneField(io::Printer* printer,
const FieldDescriptor* field,
int cached_has_bits_index);
// Generate a switch statement to serialize 2+ fields from the same oneof.
// Or, if fields.size() == 1, just call GenerateSerializeOneField().
void GenerateSerializeOneofFields(
io::Printer* printer, const std::vector<const FieldDescriptor*>& fields);
void GenerateSerializeOneExtensionRange(
io::Printer* printer, const Descriptor::ExtensionRange* range);
// Generates has_foo() functions and variables for singular field has-bits.
void GenerateSingularFieldHasBits(const FieldDescriptor* field,
Formatter format);
// Generates has_foo() functions and variables for oneof field has-bits.
void GenerateOneofHasBits(io::Printer* printer);
// Generates has_foo_bar() functions for oneof members.
void GenerateOneofMemberHasBits(const FieldDescriptor* field,
const Formatter& format);
// Generates the clear_foo() method for a field.
void GenerateFieldClear(const FieldDescriptor* field, bool is_inline,
Formatter format);
void GenerateConstructorBody(io::Printer* printer,
std::vector<bool> already_processed,
bool copy_constructor) const;
size_t HasBitsSize() const;
int HasBitIndex(const FieldDescriptor* a) const;
int HasByteIndex(const FieldDescriptor* a) const;
int HasWordIndex(const FieldDescriptor* a) const;
bool SameHasByte(const FieldDescriptor* a, const FieldDescriptor* b) const;
std::vector<uint32_t> RequiredFieldsBitMask() const;
const Descriptor* descriptor_;
int index_in_file_messages_;
TProtoStringType classname_;
Options options_;
FieldGeneratorMap field_generators_;
// optimized_order_ is the order we layout the message's fields in the
// class. This is reused to initialize the fields in-order for cache
// efficiency.
//
// optimized_order_ excludes oneof fields and weak fields.
std::vector<const FieldDescriptor*> optimized_order_;
std::vector<int> has_bit_indices_;
int max_has_bit_index_;
std::vector<const EnumGenerator*> enum_generators_;
std::vector<const ExtensionGenerator*> extension_generators_;
int num_required_fields_;
int num_weak_fields_;
// table_driven_ indicates the generated message uses table-driven parsing.
bool table_driven_;
std::unique_ptr<MessageLayoutHelper> message_layout_helper_;
std::unique_ptr<ParseFunctionGenerator> parse_function_generator_;
MessageSCCAnalyzer* scc_analyzer_;
std::map<TProtoStringType, TProtoStringType> variables_;
friend class FileGenerator;
GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MessageGenerator);
};
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__
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