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dfhack/depends/protobuf/google/protobuf/compiler/cpp/cpp_service.cc

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://code.google.com/p/protobuf/
//
// 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.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#include <google/protobuf/compiler/cpp/cpp_service.h>
#include <google/protobuf/compiler/cpp/cpp_helpers.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/stubs/strutil.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
ServiceGenerator::ServiceGenerator(const ServiceDescriptor* descriptor,
const string& dllexport_decl)
: descriptor_(descriptor) {
vars_["classname"] = descriptor_->name();
vars_["full_name"] = descriptor_->full_name();
if (dllexport_decl.empty()) {
vars_["dllexport"] = "";
} else {
vars_["dllexport"] = dllexport_decl + " ";
}
}
ServiceGenerator::~ServiceGenerator() {}
void ServiceGenerator::GenerateDeclarations(io::Printer* printer) {
// Forward-declare the stub type.
printer->Print(vars_,
"class $classname$_Stub;\n"
"\n");
GenerateInterface(printer);
GenerateStubDefinition(printer);
}
void ServiceGenerator::GenerateInterface(io::Printer* printer) {
printer->Print(vars_,
"class $dllexport$$classname$ : public ::google::protobuf::Service {\n"
" protected:\n"
" // This class should be treated as an abstract interface.\n"
" inline $classname$() {};\n"
" public:\n"
" virtual ~$classname$();\n");
printer->Indent();
printer->Print(vars_,
"\n"
"typedef $classname$_Stub Stub;\n"
"\n"
"static const ::google::protobuf::ServiceDescriptor* descriptor();\n"
"\n");
GenerateMethodSignatures(VIRTUAL, printer);
printer->Print(
"\n"
"// implements Service ----------------------------------------------\n"
"\n"
"const ::google::protobuf::ServiceDescriptor* GetDescriptor();\n"
"void CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
" ::google::protobuf::RpcController* controller,\n"
" const ::google::protobuf::Message* request,\n"
" ::google::protobuf::Message* response,\n"
" ::google::protobuf::Closure* done);\n"
"const ::google::protobuf::Message& GetRequestPrototype(\n"
" const ::google::protobuf::MethodDescriptor* method) const;\n"
"const ::google::protobuf::Message& GetResponsePrototype(\n"
" const ::google::protobuf::MethodDescriptor* method) const;\n");
printer->Outdent();
printer->Print(vars_,
"\n"
" private:\n"
" GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$);\n"
"};\n"
"\n");
}
void ServiceGenerator::GenerateStubDefinition(io::Printer* printer) {
printer->Print(vars_,
"class $dllexport$$classname$_Stub : public $classname$ {\n"
" public:\n");
printer->Indent();
printer->Print(vars_,
"$classname$_Stub(::google::protobuf::RpcChannel* channel);\n"
"$classname$_Stub(::google::protobuf::RpcChannel* channel,\n"
" ::google::protobuf::Service::ChannelOwnership ownership);\n"
"~$classname$_Stub();\n"
"\n"
"inline ::google::protobuf::RpcChannel* channel() { return channel_; }\n"
"\n"
"// implements $classname$ ------------------------------------------\n"
"\n");
GenerateMethodSignatures(NON_VIRTUAL, printer);
printer->Outdent();
printer->Print(vars_,
" private:\n"
" ::google::protobuf::RpcChannel* channel_;\n"
" bool owns_channel_;\n"
" GOOGLE_DISALLOW_EVIL_CONSTRUCTORS($classname$_Stub);\n"
"};\n"
"\n");
}
void ServiceGenerator::GenerateMethodSignatures(
VirtualOrNon virtual_or_non, io::Printer* printer) {
for (int i = 0; i < descriptor_->method_count(); i++) {
const MethodDescriptor* method = descriptor_->method(i);
map<string, string> sub_vars;
sub_vars["name"] = method->name();
sub_vars["input_type"] = ClassName(method->input_type(), true);
sub_vars["output_type"] = ClassName(method->output_type(), true);
sub_vars["virtual"] = virtual_or_non == VIRTUAL ? "virtual " : "";
printer->Print(sub_vars,
"$virtual$void $name$(::google::protobuf::RpcController* controller,\n"
" const $input_type$* request,\n"
" $output_type$* response,\n"
" ::google::protobuf::Closure* done);\n");
}
}
// ===================================================================
void ServiceGenerator::GenerateDescriptorInitializer(
io::Printer* printer, int index) {
map<string, string> vars;
vars["classname"] = descriptor_->name();
vars["index"] = SimpleItoa(index);
printer->Print(vars,
"$classname$_descriptor_ = file->service($index$);\n");
}
// ===================================================================
void ServiceGenerator::GenerateImplementation(io::Printer* printer) {
printer->Print(vars_,
"$classname$::~$classname$() {}\n"
"\n"
"const ::google::protobuf::ServiceDescriptor* $classname$::descriptor() {\n"
" protobuf_AssignDescriptorsOnce();\n"
" return $classname$_descriptor_;\n"
"}\n"
"\n"
"const ::google::protobuf::ServiceDescriptor* $classname$::GetDescriptor() {\n"
" protobuf_AssignDescriptorsOnce();\n"
" return $classname$_descriptor_;\n"
"}\n"
"\n");
// Generate methods of the interface.
GenerateNotImplementedMethods(printer);
GenerateCallMethod(printer);
GenerateGetPrototype(REQUEST, printer);
GenerateGetPrototype(RESPONSE, printer);
// Generate stub implementation.
printer->Print(vars_,
"$classname$_Stub::$classname$_Stub(::google::protobuf::RpcChannel* channel)\n"
" : channel_(channel), owns_channel_(false) {}\n"
"$classname$_Stub::$classname$_Stub(\n"
" ::google::protobuf::RpcChannel* channel,\n"
" ::google::protobuf::Service::ChannelOwnership ownership)\n"
" : channel_(channel),\n"
" owns_channel_(ownership == ::google::protobuf::Service::STUB_OWNS_CHANNEL) {}\n"
"$classname$_Stub::~$classname$_Stub() {\n"
" if (owns_channel_) delete channel_;\n"
"}\n"
"\n");
GenerateStubMethods(printer);
}
void ServiceGenerator::GenerateNotImplementedMethods(io::Printer* printer) {
for (int i = 0; i < descriptor_->method_count(); i++) {
const MethodDescriptor* method = descriptor_->method(i);
map<string, string> sub_vars;
sub_vars["classname"] = descriptor_->name();
sub_vars["name"] = method->name();
sub_vars["index"] = SimpleItoa(i);
sub_vars["input_type"] = ClassName(method->input_type(), true);
sub_vars["output_type"] = ClassName(method->output_type(), true);
printer->Print(sub_vars,
"void $classname$::$name$(::google::protobuf::RpcController* controller,\n"
" const $input_type$*,\n"
" $output_type$*,\n"
" ::google::protobuf::Closure* done) {\n"
" controller->SetFailed(\"Method $name$() not implemented.\");\n"
" done->Run();\n"
"}\n"
"\n");
}
}
void ServiceGenerator::GenerateCallMethod(io::Printer* printer) {
printer->Print(vars_,
"void $classname$::CallMethod(const ::google::protobuf::MethodDescriptor* method,\n"
" ::google::protobuf::RpcController* controller,\n"
" const ::google::protobuf::Message* request,\n"
" ::google::protobuf::Message* response,\n"
" ::google::protobuf::Closure* done) {\n"
" GOOGLE_DCHECK_EQ(method->service(), $classname$_descriptor_);\n"
" switch(method->index()) {\n");
for (int i = 0; i < descriptor_->method_count(); i++) {
const MethodDescriptor* method = descriptor_->method(i);
map<string, string> sub_vars;
sub_vars["name"] = method->name();
sub_vars["index"] = SimpleItoa(i);
sub_vars["input_type"] = ClassName(method->input_type(), true);
sub_vars["output_type"] = ClassName(method->output_type(), true);
// Note: down_cast does not work here because it only works on pointers,
// not references.
printer->Print(sub_vars,
" case $index$:\n"
" $name$(controller,\n"
" ::google::protobuf::down_cast<const $input_type$*>(request),\n"
" ::google::protobuf::down_cast< $output_type$*>(response),\n"
" done);\n"
" break;\n");
}
printer->Print(vars_,
" default:\n"
" GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
" break;\n"
" }\n"
"}\n"
"\n");
}
void ServiceGenerator::GenerateGetPrototype(RequestOrResponse which,
io::Printer* printer) {
if (which == REQUEST) {
printer->Print(vars_,
"const ::google::protobuf::Message& $classname$::GetRequestPrototype(\n");
} else {
printer->Print(vars_,
"const ::google::protobuf::Message& $classname$::GetResponsePrototype(\n");
}
printer->Print(vars_,
" const ::google::protobuf::MethodDescriptor* method) const {\n"
" GOOGLE_DCHECK_EQ(method->service(), descriptor());\n"
" switch(method->index()) {\n");
for (int i = 0; i < descriptor_->method_count(); i++) {
const MethodDescriptor* method = descriptor_->method(i);
const Descriptor* type =
(which == REQUEST) ? method->input_type() : method->output_type();
map<string, string> sub_vars;
sub_vars["index"] = SimpleItoa(i);
sub_vars["type"] = ClassName(type, true);
printer->Print(sub_vars,
" case $index$:\n"
" return $type$::default_instance();\n");
}
printer->Print(vars_,
" default:\n"
" GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
" return *reinterpret_cast< ::google::protobuf::Message*>(NULL);\n"
" }\n"
"}\n"
"\n");
}
void ServiceGenerator::GenerateStubMethods(io::Printer* printer) {
for (int i = 0; i < descriptor_->method_count(); i++) {
const MethodDescriptor* method = descriptor_->method(i);
map<string, string> sub_vars;
sub_vars["classname"] = descriptor_->name();
sub_vars["name"] = method->name();
sub_vars["index"] = SimpleItoa(i);
sub_vars["input_type"] = ClassName(method->input_type(), true);
sub_vars["output_type"] = ClassName(method->output_type(), true);
printer->Print(sub_vars,
"void $classname$_Stub::$name$(::google::protobuf::RpcController* controller,\n"
" const $input_type$* request,\n"
" $output_type$* response,\n"
" ::google::protobuf::Closure* done) {\n"
" channel_->CallMethod(descriptor()->method($index$),\n"
" controller, request, response, done);\n"
"}\n");
}
}
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
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