/*
*
* 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_GENERATOR_HELPERS_H
#define GRPC_INTERNAL_COMPILER_GENERATOR_HELPERS_H
#include <iostream>
#include <map>
#include <sstream>
#include <string>
#include <vector>
#include "src/compiler/config.h"
namespace grpc_generator {
inline bool StripSuffix(grpc::string* filename, const grpc::string& suffix) {
if (filename->length() >= suffix.length()) {
size_t suffix_pos = filename->length() - suffix.length();
if (filename->compare(suffix_pos, grpc::string::npos, suffix) == 0) {
filename->resize(filename->size() - suffix.size());
return true;
}
}
return false;
}
inline bool StripPrefix(grpc::string* name, const grpc::string& prefix) {
if (name->length() >= prefix.length()) {
if (name->substr(0, prefix.size()) == prefix) {
*name = name->substr(prefix.size());
return true;
}
}
return false;
}
inline grpc::string StripProto(grpc::string filename) {
if (!StripSuffix(&filename, ".protodevel")) {
StripSuffix(&filename, ".proto");
}
return filename;
}
inline grpc::string StringReplace(grpc::string str, const grpc::string& from,
const grpc::string& to, bool replace_all) {
size_t pos = 0;
do {
pos = str.find(from, pos);
if (pos == grpc::string::npos) {
break;
}
str.replace(pos, from.length(), to);
pos += to.length();
} while (replace_all);
return str;
}
inline grpc::string StringReplace(grpc::string str, const grpc::string& from,
const grpc::string& to) {
return StringReplace(str, from, to, true);
}
inline std::vector<grpc::string> tokenize(const grpc::string& input,
const grpc::string& delimiters) {
std::vector<grpc::string> tokens;
size_t pos, last_pos = 0;
for (;;) {
bool done = false;
pos = input.find_first_of(delimiters, last_pos);
if (pos == grpc::string::npos) {
done = true;
pos = input.length();
}
tokens.push_back(input.substr(last_pos, pos - last_pos));
if (done) return tokens;
last_pos = pos + 1;
}
}
inline grpc::string CapitalizeFirstLetter(grpc::string s) {
if (s.empty()) {
return s;
}
s[0] = ::toupper(s[0]);
return s;
}
inline grpc::string LowercaseFirstLetter(grpc::string s) {
if (s.empty()) {
return s;
}
s[0] = ::tolower(s[0]);
return s;
}
inline grpc::string LowerUnderscoreToUpperCamel(grpc::string str) {
std::vector<grpc::string> tokens = tokenize(str, "_");
grpc::string result = "";
for (unsigned int i = 0; i < tokens.size(); i++) {
result += CapitalizeFirstLetter(tokens[i]);
}
return result;
}
inline grpc::string FileNameInUpperCamel(
const grpc::protobuf::FileDescriptor* file, bool include_package_path) {
std::vector<grpc::string> tokens = tokenize(StripProto(file->name()), "/");
grpc::string result = "";
if (include_package_path) {
for (unsigned int i = 0; i < tokens.size() - 1; i++) {
result += tokens[i] + "/";
}
}
result += LowerUnderscoreToUpperCamel(tokens.back());
return result;
}
inline grpc::string FileNameInUpperCamel(
const grpc::protobuf::FileDescriptor* file) {
return FileNameInUpperCamel(file, true);
}
enum MethodType {
METHODTYPE_NO_STREAMING,
METHODTYPE_CLIENT_STREAMING,
METHODTYPE_SERVER_STREAMING,
METHODTYPE_BIDI_STREAMING
};
inline MethodType GetMethodType(
const grpc::protobuf::MethodDescriptor* method) {
if (method->client_streaming()) {
if (method->server_streaming()) {
return METHODTYPE_BIDI_STREAMING;
} else {
return METHODTYPE_CLIENT_STREAMING;
}
} else {
if (method->server_streaming()) {
return METHODTYPE_SERVER_STREAMING;
} else {
return METHODTYPE_NO_STREAMING;
}
}
}
inline void Split(const grpc::string& s, char delim,
std::vector<grpc::string>* append_to) {
std::istringstream iss(s);
grpc::string piece;
while (std::getline(iss, piece)) {
append_to->push_back(piece);
}
}
enum CommentType {
COMMENTTYPE_LEADING,
COMMENTTYPE_TRAILING,
COMMENTTYPE_LEADING_DETACHED
};
// Get all the raw comments and append each line without newline to out.
template <typename DescriptorType>
inline void GetComment(const DescriptorType* desc, CommentType type,
std::vector<grpc::string>* out) {
grpc::protobuf::SourceLocation location;
if (!desc->GetSourceLocation(&location)) {
return;
}
if (type == COMMENTTYPE_LEADING || type == COMMENTTYPE_TRAILING) {
const grpc::string& comments = type == COMMENTTYPE_LEADING
? location.leading_comments
: location.trailing_comments;
Split(comments, '\n', out);
} else if (type == COMMENTTYPE_LEADING_DETACHED) {
for (unsigned int i = 0; i < location.leading_detached_comments.size();
i++) {
Split(location.leading_detached_comments[i], '\n', out);
out->push_back("");
}
} else {
std::cerr << "Unknown comment type " << type << std::endl;
abort();
}
}
// Each raw comment line without newline is appended to out.
// For file level leading and detached leading comments, we return comments
// above syntax line. Return nothing for trailing comments.
template <>
inline void GetComment(const grpc::protobuf::FileDescriptor* desc,
CommentType type, std::vector<grpc::string>* out) {
if (type == COMMENTTYPE_TRAILING) {
return;
}
grpc::protobuf::SourceLocation location;
std::vector<int> path;
path.push_back(grpc::protobuf::FileDescriptorProto::kSyntaxFieldNumber);
if (!desc->GetSourceLocation(path, &location)) {
return;
}
if (type == COMMENTTYPE_LEADING) {
Split(location.leading_comments, '\n', out);
} else if (type == COMMENTTYPE_LEADING_DETACHED) {
for (unsigned int i = 0; i < location.leading_detached_comments.size();
i++) {
Split(location.leading_detached_comments[i], '\n', out);
out->push_back("");
}
} else {
std::cerr << "Unknown comment type " << type << std::endl;
abort();
}
}
// Add prefix and newline to each comment line and concatenate them together.
// Make sure there is a space after the prefix unless the line is empty.
inline grpc::string GenerateCommentsWithPrefix(
const std::vector<grpc::string>& in, const grpc::string& prefix) {
std::ostringstream oss;
for (auto it = in.begin(); it != in.end(); it++) {
const grpc::string& elem = *it;
if (elem.empty()) {
oss << prefix << "\n";
} else if (elem[0] == ' ') {
oss << prefix << elem << "\n";
} else {
oss << prefix << " " << elem << "\n";
}
}
return oss.str();
}
template <typename DescriptorType>
inline grpc::string GetPrefixedComments(const DescriptorType* desc,
bool leading,
const grpc::string& prefix) {
std::vector<grpc::string> out;
if (leading) {
grpc_generator::GetComment(
desc, grpc_generator::COMMENTTYPE_LEADING_DETACHED, &out);
std::vector<grpc::string> leading;
grpc_generator::GetComment(desc, grpc_generator::COMMENTTYPE_LEADING,
&leading);
out.insert(out.end(), leading.begin(), leading.end());
} else {
grpc_generator::GetComment(desc, grpc_generator::COMMENTTYPE_TRAILING,
&out);
}
return GenerateCommentsWithPrefix(out, prefix);
}
} // namespace grpc_generator
#endif // GRPC_INTERNAL_COMPILER_GENERATOR_HELPERS_H