💿🐜 Antkeeper source code
https://antkeeper.com
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169 lines
4.1 KiB
169 lines
4.1 KiB
/*
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* Copyright (C) 2017-2019 Christopher J. Howard
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*
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* This file is part of Antkeeper Source Code.
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*
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* Antkeeper Source Code 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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* Antkeeper Source Code 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 Antkeeper Source Code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PARAMETER_DICT_HPP
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#define PARAMETER_DICT_HPP
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#include <array>
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#include <map>
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#include <optional>
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#include <string>
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#include <vector>
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/**
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* A dictionary of parameters. Parameter values are stored as strings.
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*/
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class ParameterDict
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{
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public:
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/**
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* Sets the value of a parameter. This value will be stored as a string.
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*
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* @tparam T Parameter value type.
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* @param name Name of the parameter.
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* @param value Value of the parameter.
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*/
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template<class T>
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void set(const std::string& name, const T& value);
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/**
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* Sets the values of an array parameter. These values will be stored as a string.
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*
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* @tparam T Array element type.
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* @tparam N Size of the array.
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* @param name Name of the parameter.
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* @param values Array of values.
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*/
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template <class T, std::size_t N>
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void set(const std::string& name, const std::array<T, N>& values);
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/**
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* Removes a parameter from the parameter dict.
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*
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* @param name Name of the parameter to be removed.
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*/
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void unset(const std::string& name);
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/**
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* Returns the value of a parameter. If the parameter has not been set, std::nullopt will be returned.
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*
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* @tparam T Parameter value type.
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* @param name Name of the parameter.
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*/
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template<class T>
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std::optional<T> get(const std::string& name);
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/**
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* Returns the values of an array parameter. If the parameter has not been set, std::nyllopt will be returned.
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*
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* @tparam T Array element type.
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* @tparam N Size of the array.
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* @param name Name of the parameter.
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*/
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template <class T, std::size_t N>
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std::optional<std::array<T, N>> get(const std::string& name);
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/// Returns all parameters in the dict.
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const std::map<std::string, std::string>* getParameters() const;
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private:
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/// Converts a value to a string.
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template <class T>
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static std::string toString(const T& value);
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/// Converts a string to a value.
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template <class T>
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static T fromString(const std::string& string);
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/// Splits a string into space-delimeted tokens
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static std::vector<std::string> tokenize(const std::string& string);
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std::map<std::string, std::string> parameters;
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};
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template <class T>
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void ParameterDict::set(const std::string& name, const T& value)
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{
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parameters[name] = toString<T>(value);
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}
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template <class T, std::size_t N>
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void ParameterDict::set(const std::string& name, const std::array<T, N>& values)
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{
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std::string string;
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for (std::size_t i = 0; i < N; ++i)
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{
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string += toString<T>(values[i]);
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if (i < N - 1)
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{
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string += ' ';
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}
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}
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parameters[name] = string;
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}
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template <class T>
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std::optional<T> ParameterDict::get(const std::string& name)
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{
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auto it = parameters.find(name);
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if (it == parameters.end())
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{
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return std::nullopt;
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}
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return fromString<T>(it->second);
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}
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template <class T, std::size_t N>
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std::optional<std::array<T, N>> ParameterDict::get(const std::string& name)
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{
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auto it = parameters.find(name);
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if (it == parameters.end())
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{
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return std::nullopt;
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}
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// Create array to hold values
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std::array<T, N> values;
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// Tokenize string
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std::vector<std::string> tokens = tokenize(it->second);
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for (std::size_t i = 0; i < tokens.size(); ++i)
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{
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if (i >= values.size())
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{
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break;
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}
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// Convert token to value
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values[i] = fromString<T>(tokens[i]);
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}
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return values;
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}
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inline const std::map<std::string, std::string>* ParameterDict::getParameters() const
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{
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return ¶meters;
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}
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#endif // PARAMETER_DICT_HPP
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