| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <string_view> |
| #include <vector> |
| |
| namespace android::incfs { |
| |
| // Splits a string and calls |onSplitCb| for each occurrence of a substring |
| // between delimiters (including empty ones for two delimiters in a row) |
| // |
| // |delimiters| can either be a list of delimiters in something string-like |
| // or a single character (which is more efficient). |
| // |
| // An empty string is not a valid delimiter. |
| // |
| template <class Callback, class Separator> |
| void Split(std::string_view s, Separator delimiters, Callback&& onSplitCb) { |
| size_t base = 0; |
| for (;;) { |
| const auto found = s.find_first_of(delimiters, base); |
| onSplitCb(s.substr(base, found - base)); |
| if (found == std::string_view::npos) { |
| break; |
| } |
| base = found + 1; |
| } |
| } |
| |
| // Splits a string into a vector of string views. |
| // |
| // The string is split at each occurrence of a character in |delimiters|. |
| // |
| // The empty string is not a valid delimiter list. |
| // |
| template <class Separator> |
| void Split(std::string_view s, Separator delimiters, std::vector<std::string_view>* out) { |
| out->clear(); |
| Split(s, delimiters, [out](std::string_view split) { out->emplace_back(split); }); |
| } |
| |
| template <class Separator> |
| std::vector<std::string_view> Split(std::string_view s, Separator delimiters) { |
| std::vector<std::string_view> result; |
| Split(s, delimiters, &result); |
| return result; |
| } |
| |
| } // namespace android::incfs |