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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 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_generator.h>
#include <vector>
#include <utility>
#include <google/protobuf/compiler/cpp/cpp_file.h>
#include <google/protobuf/compiler/cpp/cpp_helpers.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/zero_copy_stream.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/strutil.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
namespace {
// Parses a set of comma-delimited name/value pairs, e.g.:
// "foo=bar,baz,qux=corge"
// parses to the pairs:
// ("foo", "bar"), ("baz", ""), ("qux", "corge")
void ParseOptions(const string& text, vector<pair<string, string> >* output) {
vector<string> parts;
SplitStringUsing(text, ",", &parts);
for (int i = 0; i < parts.size(); i++) {
string::size_type equals_pos = parts[i].find_first_of('=');
pair<string, string> value;
if (equals_pos == string::npos) {
value.first = parts[i];
value.second = "";
} else {
value.first = parts[i].substr(0, equals_pos);
value.second = parts[i].substr(equals_pos + 1);
}
output->push_back(value);
}
}
} // namespace
CppGenerator::CppGenerator() {}
CppGenerator::~CppGenerator() {}
bool CppGenerator::Generate(const FileDescriptor* file,
const string& parameter,
OutputDirectory* output_directory,
string* error) const {
vector<pair<string, string> > options;
ParseOptions(parameter, &options);
// -----------------------------------------------------------------
// parse generator options
// TODO(kenton): If we ever have more options, we may want to create a
// class that encapsulates them which we can pass down to all the
// generator classes. Currently we pass dllexport_decl down to all of
// them via the constructors, but we don't want to have to add another
// constructor parameter for every option.
// If the dllexport_decl option is passed to the compiler, we need to write
// it in front of every symbol that should be exported if this .proto is
// compiled into a Windows DLL. E.g., if the user invokes the protocol
// compiler as:
// protoc --cpp_out=dllexport_decl=FOO_EXPORT:outdir foo.proto
// then we'll define classes like this:
// class FOO_EXPORT Foo {
// ...
// }
// FOO_EXPORT is a macro which should expand to __declspec(dllexport) or
// __declspec(dllimport) depending on what is being compiled.
string dllexport_decl;
for (int i = 0; i < options.size(); i++) {
if (options[i].first == "dllexport_decl") {
dllexport_decl = options[i].second;
} else {
*error = "Unknown generator option: " + options[i].first;
return false;
}
}
// -----------------------------------------------------------------
string basename = StripProto(file->name());
basename.append(".pb");
FileGenerator file_generator(file, dllexport_decl);
// Generate header.
{
scoped_ptr<io::ZeroCopyOutputStream> output(
output_directory->Open(basename + ".h"));
io::Printer printer(output.get(), '$');
file_generator.GenerateHeader(&printer);
}
// Generate cc file.
{
scoped_ptr<io::ZeroCopyOutputStream> output(
output_directory->Open(basename + ".cc"));
io::Printer printer(output.get(), '$');
file_generator.GenerateSource(&printer);
}
return true;
}
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
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