/thirdparty/breakpad/third_party/protobuf/protobuf/src/google/protobuf/compiler/plugin.cc

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 30
 31// Author: kenton@google.com (Kenton Varda)
 32
 33#include <google/protobuf/compiler/plugin.h>
 34
 35#include <iostream>
 36#include <set>
 37
 38#ifdef _WIN32
 39#include <io.h>
 40#include <fcntl.h>
 41#ifndef STDIN_FILENO
 42#define STDIN_FILENO 0
 43#endif
 44#ifndef STDOUT_FILENO
 45#define STDOUT_FILENO 1
 46#endif
 47#else
 48#include <unistd.h>
 49#endif
 50
 51#include <google/protobuf/stubs/common.h>
 52#include <google/protobuf/compiler/plugin.pb.h>
 53#include <google/protobuf/compiler/code_generator.h>
 54#include <google/protobuf/descriptor.h>
 55#include <google/protobuf/io/zero_copy_stream_impl.h>
 56
 57
 58namespace google {
 59namespace protobuf {
 60namespace compiler {
 61
 62class GeneratorResponseContext : public GeneratorContext {
 63 public:
 64  GeneratorResponseContext(CodeGeneratorResponse* response,
 65                           const vector<const FileDescriptor*>& parsed_files)
 66      : response_(response),
 67        parsed_files_(parsed_files) {}
 68  virtual ~GeneratorResponseContext() {}
 69
 70  // implements GeneratorContext --------------------------------------
 71
 72  virtual io::ZeroCopyOutputStream* Open(const string& filename) {
 73    CodeGeneratorResponse::File* file = response_->add_file();
 74    file->set_name(filename);
 75    return new io::StringOutputStream(file->mutable_content());
 76  }
 77
 78  virtual io::ZeroCopyOutputStream* OpenForInsert(
 79      const string& filename, const string& insertion_point) {
 80    CodeGeneratorResponse::File* file = response_->add_file();
 81    file->set_name(filename);
 82    file->set_insertion_point(insertion_point);
 83    return new io::StringOutputStream(file->mutable_content());
 84  }
 85
 86  void ListParsedFiles(vector<const FileDescriptor*>* output) {
 87    *output = parsed_files_;
 88  }
 89
 90 private:
 91  CodeGeneratorResponse* response_;
 92  const vector<const FileDescriptor*>& parsed_files_;
 93};
 94
 95int PluginMain(int argc, char* argv[], const CodeGenerator* generator) {
 96
 97  if (argc > 1) {
 98    cerr << argv[0] << ": Unknown option: " << argv[1] << endl;
 99    return 1;
100  }
101
102#ifdef _WIN32
103  _setmode(STDIN_FILENO, _O_BINARY);
104  _setmode(STDOUT_FILENO, _O_BINARY);
105#endif
106
107  CodeGeneratorRequest request;
108  if (!request.ParseFromFileDescriptor(STDIN_FILENO)) {
109    cerr << argv[0] << ": protoc sent unparseable request to plugin." << endl;
110    return 1;
111  }
112
113  DescriptorPool pool;
114  for (int i = 0; i < request.proto_file_size(); i++) {
115    const FileDescriptor* file = pool.BuildFile(request.proto_file(i));
116    if (file == NULL) {
117      // BuildFile() already wrote an error message.
118      return 1;
119    }
120  }
121
122  vector<const FileDescriptor*> parsed_files;
123  for (int i = 0; i < request.file_to_generate_size(); i++) {
124    parsed_files.push_back(pool.FindFileByName(request.file_to_generate(i)));
125    if (parsed_files.back() == NULL) {
126      cerr << argv[0] << ": protoc asked plugin to generate a file but "
127              "did not provide a descriptor for the file: "
128           << request.file_to_generate(i) << endl;
129      return 1;
130    }
131  }
132
133  CodeGeneratorResponse response;
134  GeneratorResponseContext context(&response, parsed_files);
135
136  for (int i = 0; i < parsed_files.size(); i++) {
137    const FileDescriptor* file = parsed_files[i];
138
139    string error;
140    bool succeeded = generator->Generate(
141        file, request.parameter(), &context, &error);
142
143    if (!succeeded && error.empty()) {
144      error = "Code generator returned false but provided no error "
145              "description.";
146    }
147    if (!error.empty()) {
148      response.set_error(file->name() + ": " + error);
149      break;
150    }
151  }
152
153  if (!response.SerializeToFileDescriptor(STDOUT_FILENO)) {
154    cerr << argv[0] << ": Error writing to stdout." << endl;
155    return 1;
156  }
157
158  return 0;
159}
160
161}  // namespace compiler
162}  // namespace protobuf
163}  // namespace google