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65 lines
2.0 KiB
65 lines
2.0 KiB
4 months ago
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <string_view>
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#include <vector>
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namespace android::incfs {
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// Splits a string and calls |onSplitCb| for each occurrence of a substring
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// between delimiters (including empty ones for two delimiters in a row)
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//
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// |delimiters| can either be a list of delimiters in something string-like
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// or a single character (which is more efficient).
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//
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// An empty string is not a valid delimiter.
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//
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template <class Callback, class Separator>
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void Split(std::string_view s, Separator delimiters, Callback&& onSplitCb) {
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size_t base = 0;
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for (;;) {
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const auto found = s.find_first_of(delimiters, base);
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onSplitCb(s.substr(base, found - base));
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if (found == std::string_view::npos) {
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break;
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}
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base = found + 1;
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}
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}
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// Splits a string into a vector of string views.
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//
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// The string is split at each occurrence of a character in |delimiters|.
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//
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// The empty string is not a valid delimiter list.
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//
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template <class Separator>
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void Split(std::string_view s, Separator delimiters, std::vector<std::string_view>* out) {
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out->clear();
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Split(s, delimiters, [out](std::string_view split) { out->emplace_back(split); });
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}
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template <class Separator>
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std::vector<std::string_view> Split(std::string_view s, Separator delimiters) {
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std::vector<std::string_view> result;
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Split(s, delimiters, &result);
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return result;
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}
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} // namespace android::incfs
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