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/*
*
* Copyright 2015 gRPC authors.
*
* 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.
*
*/
#ifndef GRPC_INTERNAL_COMPILER_PYTHON_GENERATOR_HELPERS_H
#define GRPC_INTERNAL_COMPILER_PYTHON_GENERATOR_HELPERS_H
#include <cstring>
#include <fstream>
#include <iostream>
#include <vector>
#include "src/compiler/config.h"
#include "src/compiler/generator_helpers.h"
#include "src/compiler/python_generator.h"
#include "src/compiler/python_private_generator.h"
using grpc::protobuf::Descriptor;
using grpc::protobuf::FileDescriptor;
using grpc::protobuf::MethodDescriptor;
using grpc::protobuf::ServiceDescriptor;
using grpc::protobuf::compiler::GeneratorContext;
using grpc::protobuf::io::CodedOutputStream;
using grpc::protobuf::io::Printer;
using grpc::protobuf::io::StringOutputStream;
using grpc::protobuf::io::ZeroCopyOutputStream;
using grpc_generator::StringReplace;
using grpc_generator::StripProto;
using std::vector;
namespace grpc_python_generator {
namespace {
typedef vector<const Descriptor*> DescriptorVector;
typedef vector<TString> StringVector;
static TString StripModulePrefixes(
const TString& raw_module_name,
const std::vector<TString>& prefixes_to_filter) {
for (const auto& prefix : prefixes_to_filter) {
if (raw_module_name.rfind(prefix, 0) == 0) {
return raw_module_name.substr(prefix.size(),
raw_module_name.size() - prefix.size());
}
}
return raw_module_name;
}
// TODO(https://github.com/protocolbuffers/protobuf/issues/888):
// Export `ModuleName` from protobuf's
// `src/google/protobuf/compiler/python/python_generator.cc` file.
TString ModuleName(const TString& filename,
const TString& import_prefix,
const std::vector<TString>& prefixes_to_filter) {
TString basename = StripProto(filename);
basename = StringReplace(basename, "-", "_");
basename = StringReplace(basename, "/", ".");
return StripModulePrefixes(import_prefix + basename + "_pb2",
prefixes_to_filter);
}
// TODO(https://github.com/protocolbuffers/protobuf/issues/888):
// Export `ModuleAlias` from protobuf's
// `src/google/protobuf/compiler/python/python_generator.cc` file.
TString ModuleAlias(const TString& filename,
const TString& import_prefix,
const std::vector<TString>& prefixes_to_filter) {
TString module_name =
ModuleName(filename, import_prefix, prefixes_to_filter);
// We can't have dots in the module name, so we replace each with _dot_.
// But that could lead to a collision between a.b and a_dot_b, so we also
// duplicate each underscore.
module_name = StringReplace(module_name, "_", "__");
module_name = StringReplace(module_name, ".", "_dot_");
return module_name;
}
bool GetModuleAndMessagePath(
const Descriptor* type, TString* out, TString generator_file_name,
bool generate_in_pb2_grpc, TString& import_prefix,
const std::vector<TString>& prefixes_to_filter) {
const Descriptor* path_elem_type = type;
DescriptorVector message_path;
do {
message_path.push_back(path_elem_type);
path_elem_type = path_elem_type->containing_type();
} while (path_elem_type); // implicit nullptr comparison; don't be explicit
TString file_name = type->file()->name();
static const int proto_suffix_length = strlen(".proto");
if (!(file_name.size() > static_cast<size_t>(proto_suffix_length) &&
file_name.find_last_of(".proto") == file_name.size() - 1)) {
return false;
}
TString module;
if (generator_file_name != file_name || generate_in_pb2_grpc) {
module = ModuleAlias(file_name, import_prefix, prefixes_to_filter) + ".";
} else {
module = "";
}
TString message_type;
for (DescriptorVector::reverse_iterator path_iter = message_path.rbegin();
path_iter != message_path.rend(); ++path_iter) {
message_type += (*path_iter)->name() + ".";
}
// no pop_back prior to C++11
message_type.resize(message_type.size() - 1);
*out = module + message_type;
return true;
}
template <typename DescriptorType>
StringVector get_all_comments(const DescriptorType* descriptor) {
StringVector comments;
grpc_generator::GetComment(
descriptor, grpc_generator::COMMENTTYPE_LEADING_DETACHED, &comments);
grpc_generator::GetComment(descriptor, grpc_generator::COMMENTTYPE_LEADING,
&comments);
grpc_generator::GetComment(descriptor, grpc_generator::COMMENTTYPE_TRAILING,
&comments);
return comments;
}
inline void Split(const TString& s, char delim,
std::vector<TString>* append_to) {
if (s.empty()) {
// splitting an empty string logically produces a single-element list
append_to->emplace_back();
} else {
auto current = s.begin();
while (current < s.end()) {
const auto next = std::find(current, s.end(), delim);
append_to->emplace_back(current, next);
current = next;
if (current != s.end()) {
// it was the delimiter - need to be at the start of the next entry
++current;
}
}
}
}
} // namespace
} // namespace grpc_python_generator
#endif // GRPC_INTERNAL_COMPILER_PYTHON_GENERATOR_HELPERS_H
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