1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
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13 // in the documentation and/or other materials provided with the
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18 //
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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
58 namespace google {
59 namespace protobuf {
60 namespace compiler {
61
62 class GeneratorResponseContext : public GeneratorContext {
63 public:
GeneratorResponseContext(CodeGeneratorResponse * response,const vector<const FileDescriptor * > & parsed_files)64 GeneratorResponseContext(CodeGeneratorResponse* response,
65 const vector<const FileDescriptor*>& parsed_files)
66 : response_(response),
67 parsed_files_(parsed_files) {}
~GeneratorResponseContext()68 virtual ~GeneratorResponseContext() {}
69
70 // implements GeneratorContext --------------------------------------
71
Open(const string & filename)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
OpenForInsert(const string & filename,const string & insertion_point)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
ListParsedFiles(vector<const FileDescriptor * > * output)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
PluginMain(int argc,char * argv[],const CodeGenerator * generator)95 int 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
164