1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// http://code.google.com/p/protobuf/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// Author: kenton@google.com (Kenton Varda) 32// Based on original Protocol Buffers design by 33// Sanjay Ghemawat, Jeff Dean, and others. 34 35#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__ 36#define GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__ 37 38#include <string> 39#include <google/protobuf/stubs/common.h> 40#include <google/protobuf/compiler/cpp/cpp_field.h> 41 42namespace google { 43namespace protobuf { 44 namespace io { 45 class Printer; // printer.h 46 } 47} 48 49namespace protobuf { 50namespace compiler { 51namespace cpp { 52 53class EnumGenerator; // enum.h 54class ExtensionGenerator; // extension.h 55 56class MessageGenerator { 57 public: 58 // See generator.cc for the meaning of dllexport_decl. 59 explicit MessageGenerator(const Descriptor* descriptor, 60 const string& dllexport_decl); 61 ~MessageGenerator(); 62 63 // Header stuff. 64 65 // Generate foward declarations for this class and all its nested types. 66 void GenerateForwardDeclaration(io::Printer* printer); 67 68 // Generate definitions of all nested enums (must come before class 69 // definitions because those classes use the enums definitions). 70 void GenerateEnumDefinitions(io::Printer* printer); 71 72 // Generate specializations of GetEnumDescriptor<MyEnum>(). 73 // Precondition: in ::google::protobuf namespace. 74 void GenerateGetEnumDescriptorSpecializations(io::Printer* printer); 75 76 // Generate definitions for this class and all its nested types. 77 void GenerateClassDefinition(io::Printer* printer); 78 79 // Generate definitions of inline methods (placed at the end of the header 80 // file). 81 void GenerateInlineMethods(io::Printer* printer); 82 83 // Source file stuff. 84 85 // Generate code which declares all the global descriptor pointers which 86 // will be initialized by the methods below. 87 void GenerateDescriptorDeclarations(io::Printer* printer); 88 89 // Generate code that initializes the global variable storing the message's 90 // descriptor. 91 void GenerateDescriptorInitializer(io::Printer* printer, int index); 92 93 // Generate code that calls MessageFactory::InternalRegisterGeneratedMessage() 94 // for all types. 95 void GenerateTypeRegistrations(io::Printer* printer); 96 97 // Generates code that allocates the message's default instance. 98 void GenerateDefaultInstanceAllocator(io::Printer* printer); 99 100 // Generates code that initializes the message's default instance. This 101 // is separate from allocating because all default instances must be 102 // allocated before any can be initialized. 103 void GenerateDefaultInstanceInitializer(io::Printer* printer); 104 105 // Generates code that should be run when ShutdownProtobufLibrary() is called, 106 // to delete all dynamically-allocated objects. 107 void GenerateShutdownCode(io::Printer* printer); 108 109 // Generate all non-inline methods for this class. 110 void GenerateClassMethods(io::Printer* printer); 111 112 private: 113 // Generate declarations and definitions of accessors for fields. 114 void GenerateFieldAccessorDeclarations(io::Printer* printer); 115 void GenerateFieldAccessorDefinitions(io::Printer* printer); 116 117 // Generate the field offsets array. 118 void GenerateOffsets(io::Printer* printer); 119 120 // Generate constructors and destructor. 121 void GenerateStructors(io::Printer* printer); 122 123 // The compiler typically generates multiple copies of each constructor and 124 // destructor: http://gcc.gnu.org/bugs.html#nonbugs_cxx 125 // Placing common code in a separate method reduces the generated code size. 126 // 127 // Generate the shared constructor code. 128 void GenerateSharedConstructorCode(io::Printer* printer); 129 // Generate the shared destructor code. 130 void GenerateSharedDestructorCode(io::Printer* printer); 131 132 // Generate standard Message methods. 133 void GenerateClear(io::Printer* printer); 134 void GenerateMergeFromCodedStream(io::Printer* printer); 135 void GenerateSerializeWithCachedSizes(io::Printer* printer); 136 void GenerateSerializeWithCachedSizesToArray(io::Printer* printer); 137 void GenerateSerializeWithCachedSizesBody(io::Printer* printer, 138 bool to_array); 139 void GenerateByteSize(io::Printer* printer); 140 void GenerateMergeFrom(io::Printer* printer); 141 void GenerateCopyFrom(io::Printer* printer); 142 void GenerateSwap(io::Printer* printer); 143 void GenerateIsInitialized(io::Printer* printer); 144 145 // Helpers for GenerateSerializeWithCachedSizes(). 146 void GenerateSerializeOneField(io::Printer* printer, 147 const FieldDescriptor* field, 148 bool unbounded); 149 void GenerateSerializeOneExtensionRange( 150 io::Printer* printer, const Descriptor::ExtensionRange* range, 151 bool unbounded); 152 153 154 const Descriptor* descriptor_; 155 string classname_; 156 string dllexport_decl_; 157 FieldGeneratorMap field_generators_; 158 scoped_array<scoped_ptr<MessageGenerator> > nested_generators_; 159 scoped_array<scoped_ptr<EnumGenerator> > enum_generators_; 160 scoped_array<scoped_ptr<ExtensionGenerator> > extension_generators_; 161 162 GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MessageGenerator); 163}; 164 165} // namespace cpp 166} // namespace compiler 167} // namespace protobuf 168 169} // namespace google 170#endif // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__ 171