/thirdparty/breakpad/third_party/protobuf/protobuf/src/google/protobuf/compiler/cpp/cpp_generator.cc

  1// Protocol Buffers - Google's data interchange format
  2// Copyright 2008 Google Inc.  All rights reserved.
  3// http://code.google.com/p/protobuf/
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 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#include <google/protobuf/compiler/cpp/cpp_generator.h>
 36
 37#include <vector>
 38#include <utility>
 39
 40#include <google/protobuf/compiler/cpp/cpp_file.h>
 41#include <google/protobuf/compiler/cpp/cpp_helpers.h>
 42#include <google/protobuf/io/printer.h>
 43#include <google/protobuf/io/zero_copy_stream.h>
 44#include <google/protobuf/descriptor.pb.h>
 45
 46namespace google {
 47namespace protobuf {
 48namespace compiler {
 49namespace cpp {
 50
 51CppGenerator::CppGenerator() {}
 52CppGenerator::~CppGenerator() {}
 53
 54bool CppGenerator::Generate(const FileDescriptor* file,
 55                            const string& parameter,
 56                            GeneratorContext* generator_context,
 57                            string* error) const {
 58  vector<pair<string, string> > options;
 59  ParseGeneratorParameter(parameter, &options);
 60
 61  // -----------------------------------------------------------------
 62  // parse generator options
 63
 64  // TODO(kenton):  If we ever have more options, we may want to create a
 65  //   class that encapsulates them which we can pass down to all the
 66  //   generator classes.  Currently we pass dllexport_decl down to all of
 67  //   them via the constructors, but we don't want to have to add another
 68  //   constructor parameter for every option.
 69
 70  // If the dllexport_decl option is passed to the compiler, we need to write
 71  // it in front of every symbol that should be exported if this .proto is
 72  // compiled into a Windows DLL.  E.g., if the user invokes the protocol
 73  // compiler as:
 74  //   protoc --cpp_out=dllexport_decl=FOO_EXPORT:outdir foo.proto
 75  // then we'll define classes like this:
 76  //   class FOO_EXPORT Foo {
 77  //     ...
 78  //   }
 79  // FOO_EXPORT is a macro which should expand to __declspec(dllexport) or
 80  // __declspec(dllimport) depending on what is being compiled.
 81  string dllexport_decl;
 82
 83  for (int i = 0; i < options.size(); i++) {
 84    if (options[i].first == "dllexport_decl") {
 85      dllexport_decl = options[i].second;
 86    } else {
 87      *error = "Unknown generator option: " + options[i].first;
 88      return false;
 89    }
 90  }
 91
 92  // -----------------------------------------------------------------
 93
 94
 95  string basename = StripProto(file->name());
 96  basename.append(".pb");
 97
 98  FileGenerator file_generator(file, dllexport_decl);
 99
100  // Generate header.
101  {
102    scoped_ptr<io::ZeroCopyOutputStream> output(
103      generator_context->Open(basename + ".h"));
104    io::Printer printer(output.get(), '$');
105    file_generator.GenerateHeader(&printer);
106  }
107
108  // Generate cc file.
109  {
110    scoped_ptr<io::ZeroCopyOutputStream> output(
111      generator_context->Open(basename + ".cc"));
112    io::Printer printer(output.get(), '$');
113    file_generator.GenerateSource(&printer);
114  }
115
116  return true;
117}
118
119}  // namespace cpp
120}  // namespace compiler
121}  // namespace protobuf
122}  // namespace google