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84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et: */
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/**
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* \author Marcus Holland-Moritz (github@mhxnet.de)
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* \copyright Copyright (c) Marcus Holland-Moritz
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*
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* This file is part of dwarfs.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the “Software”), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include <optional>
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#include <string>
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#include <string_view>
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#include <unordered_map>
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#include <dwarfs/conv.h>
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namespace dwarfs {
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class option_map {
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public:
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explicit option_map(std::string_view spec);
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std::string const& choice() const { return choice_; }
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bool has_options() const { return !opt_.empty(); }
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template <typename T>
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T get(std::string const& key, T const& default_value = T()) {
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auto i = opt_.find(key);
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if (i != opt_.end()) {
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std::string val = i->second;
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opt_.erase(i);
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return to<T>(val);
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}
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return default_value;
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}
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template <typename T>
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std::optional<T> get_optional(std::string const& key) {
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auto i = opt_.find(key);
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if (i != opt_.end()) {
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std::string val = i->second;
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opt_.erase(i);
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return to<T>(val);
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}
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return std::nullopt;
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}
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size_t get_size(std::string const& key, size_t default_value = 0);
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void report();
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private:
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std::unordered_map<std::string, std::string> opt_;
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std::string choice_;
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};
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} // namespace dwarfs
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