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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10 // notice, this list of conditions and the following disclaimer.
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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 GeneratorResponseOutputDirectory : public OutputDirectory {
63 public:
GeneratorResponseOutputDirectory(CodeGeneratorResponse * response)64 GeneratorResponseOutputDirectory(CodeGeneratorResponse* response)
65 : response_(response) {}
~GeneratorResponseOutputDirectory()66 virtual ~GeneratorResponseOutputDirectory() {}
67
68 // implements OutputDirectory --------------------------------------
69
Open(const string & filename)70 virtual io::ZeroCopyOutputStream* Open(const string& filename) {
71 CodeGeneratorResponse::File* file = response_->add_file();
72 file->set_name(filename);
73 return new io::StringOutputStream(file->mutable_content());
74 }
75
OpenForInsert(const string & filename,const string & insertion_point)76 virtual io::ZeroCopyOutputStream* OpenForInsert(
77 const string& filename, const string& insertion_point) {
78 CodeGeneratorResponse::File* file = response_->add_file();
79 file->set_name(filename);
80 file->set_insertion_point(insertion_point);
81 return new io::StringOutputStream(file->mutable_content());
82 }
83
84 private:
85 CodeGeneratorResponse* response_;
86 };
87
PluginMain(int argc,char * argv[],const CodeGenerator * generator)88 int PluginMain(int argc, char* argv[], const CodeGenerator* generator) {
89
90 if (argc > 1) {
91 cerr << argv[0] << ": Unknown option: " << argv[1] << endl;
92 return 1;
93 }
94
95 #ifdef _WIN32
96 _setmode(STDIN_FILENO, _O_BINARY);
97 _setmode(STDOUT_FILENO, _O_BINARY);
98 #endif
99
100 CodeGeneratorRequest request;
101 if (!request.ParseFromFileDescriptor(STDIN_FILENO)) {
102 cerr << argv[0] << ": protoc sent unparseable request to plugin." << endl;
103 return 1;
104 }
105
106 DescriptorPool pool;
107 for (int i = 0; i < request.proto_file_size(); i++) {
108 const FileDescriptor* file = pool.BuildFile(request.proto_file(i));
109 if (file == NULL) {
110 // BuildFile() already wrote an error message.
111 return 1;
112 }
113 }
114
115 CodeGeneratorResponse response;
116 GeneratorResponseOutputDirectory output_directory(&response);
117
118 for (int i = 0; i < request.file_to_generate_size(); i++) {
119 const FileDescriptor* file =
120 pool.FindFileByName(request.file_to_generate(i));
121 if (file == NULL) {
122 cerr << argv[0] << ": protoc asked plugin to generate a file but "
123 "did not provide a descriptor for the file: "
124 << request.file_to_generate(i) << endl;
125 return 1;
126 }
127
128 string error;
129 bool succeeded = generator->Generate(
130 file, request.parameter(), &output_directory, &error);
131
132 if (!succeeded && error.empty()) {
133 error = "Code generator returned false but provided no error "
134 "description.";
135 }
136 if (!error.empty()) {
137 response.set_error(file->name() + ": " + error);
138 break;
139 }
140 }
141
142 if (!response.SerializeToFileDescriptor(STDOUT_FILENO)) {
143 cerr << argv[0] << ": Error writing to stdout." << endl;
144 return 1;
145 }
146
147 return 0;
148 }
149
150 } // namespace compiler
151 } // namespace protobuf
152 } // namespace google
153