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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_RUBY_GENERATOR_STRING_INL_H
#define GRPC_INTERNAL_COMPILER_RUBY_GENERATOR_STRING_INL_H
#include "src/compiler/config.h"
#include <algorithm>
#include <sstream>
#include <vector>
using std::getline;
using std::transform;
namespace grpc_ruby_generator {
// Split splits a string using char into elems.
inline std::vector<TString>& Split(const TString& s, char delim,
std::vector<TString>* elems) {
std::stringstream ss(s);
TString item;
while (getline(ss, item, delim)) {
elems->push_back(item);
}
return *elems;
}
// Split splits a string using char, returning the result in a vector.
inline std::vector<TString> Split(const TString& s, char delim) {
std::vector<TString> elems;
Split(s, delim, &elems);
return elems;
}
// Replace replaces from with to in s.
inline TString Replace(TString s, const TString& from,
const TString& to) {
size_t start_pos = s.find(from);
if (start_pos == TString::npos) {
return s;
}
s.replace(start_pos, from.length(), to);
return s;
}
// ReplaceAll replaces all instances of search with replace in s.
inline TString ReplaceAll(TString s, const TString& search,
const TString& replace) {
size_t pos = 0;
while ((pos = s.find(search, pos)) != TString::npos) {
s.replace(pos, search.length(), replace);
pos += replace.length();
}
return s;
}
// ReplacePrefix replaces from with to in s if search is a prefix of s.
inline bool ReplacePrefix(TString* s, const TString& from,
const TString& to) {
size_t start_pos = s->find(from);
if (start_pos == TString::npos || start_pos != 0) {
return false;
}
s->replace(start_pos, from.length(), to);
return true;
}
// Modularize converts a string into a ruby module compatible name
inline TString Modularize(TString s) {
if (s.empty()) {
return s;
}
TString new_string = "";
bool was_last_underscore = false;
new_string.append(1, ::toupper(s[0]));
for (TString::size_type i = 1; i < s.size(); ++i) {
if (was_last_underscore && s[i] != '_') {
new_string.append(1, ::toupper(s[i]));
} else if (s[i] != '_') {
new_string.append(1, s[i]);
}
was_last_underscore = s[i] == '_';
}
return new_string;
}
// RubyPackage gets the ruby package in either proto or ruby_package format
inline TString RubyPackage(const grpc::protobuf::FileDescriptor* file) {
TString package_name = file->package();
if (file->options().has_ruby_package()) {
package_name = file->options().ruby_package();
// If :: is in the package convert the Ruby formatted name
// -> A::B::C
// to use the dot seperator notation
// -> A.B.C
package_name = ReplaceAll(package_name, "::", ".");
}
return package_name;
}
// RubyTypeOf updates a proto type to the required ruby equivalent.
inline TString RubyTypeOf(const grpc::protobuf::Descriptor* descriptor) {
TString proto_type = descriptor->full_name();
if (descriptor->file()->options().has_ruby_package()) {
// remove the leading package if present
ReplacePrefix(&proto_type, descriptor->file()->package(), "");
ReplacePrefix(&proto_type, ".", ""); // remove the leading . (no package)
proto_type = RubyPackage(descriptor->file()) + "." + proto_type;
}
TString res("." + proto_type);
if (res.find('.') == TString::npos) {
return res;
} else {
std::vector<TString> prefixes_and_type = Split(res, '.');
res.clear();
for (unsigned int i = 0; i < prefixes_and_type.size(); ++i) {
if (i != 0) {
res += "::"; // switch '.' to the ruby module delim
}
if (i < prefixes_and_type.size() - 1) {
res += Modularize(prefixes_and_type[i]); // capitalize pkgs
} else {
res += prefixes_and_type[i];
}
}
return res;
}
}
} // namespace grpc_ruby_generator
#endif // GRPC_INTERNAL_COMPILER_RUBY_GENERATOR_STRING_INL_H
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