Initial checkin of gRPC to third_party/

third_party/grpc/src/compiler/objective_c_plugin.cc

+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Generates Objective C gRPC service interface out of Protobuf IDL.
+
+#include <memory>
+
+#include "src/compiler/config.h"
+#include "src/compiler/objective_c_generator.h"
+#include "src/compiler/objective_c_generator_helpers.h"
+
+class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
+ public:
+  ObjectiveCGrpcGenerator() {}
+  virtual ~ObjectiveCGrpcGenerator() {}
+
+  virtual bool Generate(const grpc::protobuf::FileDescriptor *file,
+                        const ::grpc::string &parameter,
+                        grpc::protobuf::compiler::GeneratorContext *context,
+                        ::grpc::string *error) const {
+
+    if (file->service_count() == 0) {
+      // No services.  Do nothing.
+      return true;
+    }
+
+    ::grpc::string file_name = grpc_generator::FileNameInUpperCamel(file);
+    ::grpc::string prefix = file->options().objc_class_prefix();
+
+    {
+      // Generate .pbrpc.h
+
+      ::grpc::string imports = ::grpc::string("#import \"") + file_name +
+        ".pbobjc.h\"\n\n"
+        "#import <ProtoRPC/ProtoService.h>\n"
+        "#import <RxLibrary/GRXWriteable.h>\n"
+        "#import <RxLibrary/GRXWriter.h>\n";
+
+      // TODO(jcanizales): Instead forward-declare the input and output types
+      // and import the files in the .pbrpc.m
+      ::grpc::string proto_imports;
+      for (int i = 0; i < file->dependency_count(); i++) {
+        ::grpc::string header = grpc_objective_c_generator::MessageHeaderName(
+            file->dependency(i));
+        proto_imports += ::grpc::string("#import \"") + header + "\"\n";
+      }
+
+      ::grpc::string declarations;
+      for (int i = 0; i < file->service_count(); i++) {
+        const grpc::protobuf::ServiceDescriptor *service = file->service(i);
+        declarations += grpc_objective_c_generator::GetHeader(service);
+      }
+
+      Write(context, file_name + ".pbrpc.h",
+          imports + '\n' + proto_imports + '\n' + declarations);
+    }
+
+    {
+      // Generate .pbrpc.m
+
+      ::grpc::string imports = ::grpc::string("#import \"") + file_name +
+        ".pbrpc.h\"\n\n"
+        "#import <ProtoRPC/ProtoRPC.h>\n"
+        "#import <RxLibrary/GRXWriter+Immediate.h>\n";
+
+      ::grpc::string definitions;
+      for (int i = 0; i < file->service_count(); i++) {
+        const grpc::protobuf::ServiceDescriptor *service = file->service(i);
+        definitions += grpc_objective_c_generator::GetSource(service);
+      }
+
+      Write(context, file_name + ".pbrpc.m", imports + '\n' + definitions);
+    }
+
+    return true;
+  }
+
+ private:
+  // Write the given code into the given file.
+  void Write(grpc::protobuf::compiler::GeneratorContext *context,
+              const ::grpc::string &filename, const ::grpc::string &code) const {
+    std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
+        context->Open(filename));
+    grpc::protobuf::io::CodedOutputStream coded_out(output.get());
+    coded_out.WriteRaw(code.data(), code.size());
+  }
+};
+
+int main(int argc, char *argv[]) {
+  ObjectiveCGrpcGenerator generator;
+  return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
+}