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77 lines
1.8 KiB
C++
77 lines
1.8 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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* dwarfs is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* dwarfs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with dwarfs. If not, see <https://www.gnu.org/licenses/>.
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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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