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1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 // Generates C# gRPC service interface out of Protobuf IDL.
20 
21 #include <memory>
22 
23 #include "src/compiler/config.h"
24 #include "src/compiler/csharp_generator.h"
25 #include "src/compiler/csharp_generator_helpers.h"
26 
27 class CSharpGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
28  public:
CSharpGrpcGenerator()29   CSharpGrpcGenerator() {}
~CSharpGrpcGenerator()30   ~CSharpGrpcGenerator() {}
31 
Generate(const grpc::protobuf::FileDescriptor * file,const grpc::string & parameter,grpc::protobuf::compiler::GeneratorContext * context,grpc::string * error) const32   bool Generate(const grpc::protobuf::FileDescriptor* file,
33                 const grpc::string& parameter,
34                 grpc::protobuf::compiler::GeneratorContext* context,
35                 grpc::string* error) const {
36     std::vector<std::pair<grpc::string, grpc::string> > options;
37     grpc::protobuf::compiler::ParseGeneratorParameter(parameter, &options);
38 
39     bool generate_client = true;
40     bool generate_server = true;
41     bool internal_access = false;
42     for (size_t i = 0; i < options.size(); i++) {
43       if (options[i].first == "no_client") {
44         generate_client = false;
45       } else if (options[i].first == "no_server") {
46         generate_server = false;
47       } else if (options[i].first == "internal_access") {
48         internal_access = true;
49       } else {
50         *error = "Unknown generator option: " + options[i].first;
51         return false;
52       }
53     }
54 
55     grpc::string code = grpc_csharp_generator::GetServices(
56         file, generate_client, generate_server, internal_access);
57     if (code.size() == 0) {
58       return true;  // don't generate a file if there are no services
59     }
60 
61     // Get output file name.
62     grpc::string file_name;
63     if (!grpc_csharp_generator::ServicesFilename(file, &file_name)) {
64       return false;
65     }
66     std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
67         context->Open(file_name));
68     grpc::protobuf::io::CodedOutputStream coded_out(output.get());
69     coded_out.WriteRaw(code.data(), code.size());
70     return true;
71   }
72 };
73 
main(int argc,char * argv[])74 int main(int argc, char* argv[]) {
75   CSharpGrpcGenerator generator;
76   return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
77 }
78