135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_CONFIG_DATA_HXX
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#define MPD_CONFIG_DATA_HXX
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#include "Option.hxx"
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#include "Param.hxx"
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#include "Block.hxx"
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#include <array>
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#include <chrono>
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#include <forward_list>
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class AllocatedPath;
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struct ConfigData {
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std::array<std::forward_list<ConfigParam>, std::size_t(ConfigOption::MAX)> params;
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std::array<std::forward_list<ConfigBlock>, std::size_t(ConfigBlockOption::MAX)> blocks;
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void Clear();
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auto &GetParamList(ConfigOption option) noexcept {
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return params[size_t(option)];
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}
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const auto &GetParamList(ConfigOption option) const noexcept {
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return params[size_t(option)];
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}
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void AddParam(ConfigOption option, ConfigParam &¶m) noexcept;
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gcc_pure
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const ConfigParam *GetParam(ConfigOption option) const noexcept {
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const auto &list = GetParamList(option);
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return list.empty() ? nullptr : &list.front();
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}
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template<typename F>
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auto With(ConfigOption option, F &&f) const {
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const auto *param = GetParam(option);
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return param != nullptr
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? param->With(std::forward<F>(f))
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: f(nullptr);
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}
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gcc_pure
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const char *GetString(ConfigOption option,
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const char *default_value=nullptr) const noexcept;
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/**
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* Returns an optional configuration variable which contains an
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* absolute path. If there is a tilde prefix, it is expanded.
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* Returns nullptr if the value is not present.
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*
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* Throws #std::runtime_error on error.
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*/
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AllocatedPath GetPath(ConfigOption option) const;
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unsigned GetUnsigned(ConfigOption option,
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unsigned default_value) const;
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std::chrono::steady_clock::duration
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GetUnsigned(ConfigOption option,
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std::chrono::steady_clock::duration default_value) const {
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// TODO: allow unit suffixes
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auto u = GetUnsigned(option, default_value.count());
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return std::chrono::steady_clock::duration(u);
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}
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unsigned GetPositive(ConfigOption option,
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unsigned default_value) const;
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std::chrono::steady_clock::duration
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GetPositive(ConfigOption option,
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std::chrono::steady_clock::duration default_value) const {
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// TODO: allow unit suffixes
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auto u = GetPositive(option, default_value.count());
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return std::chrono::steady_clock::duration(u);
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}
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bool GetBool(ConfigOption option, bool default_value) const;
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auto &GetBlockList(ConfigBlockOption option) noexcept {
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return blocks[size_t(option)];
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}
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const auto &GetBlockList(ConfigBlockOption option) const noexcept {
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return blocks[size_t(option)];
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}
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ConfigBlock &AddBlock(ConfigBlockOption option,
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ConfigBlock &&block) noexcept;
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gcc_pure
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const ConfigBlock *GetBlock(ConfigBlockOption option) const noexcept {
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const auto &list = GetBlockList(option);
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return list.empty() ? nullptr : &list.front();
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}
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/**
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* Find a block with a matching attribute.
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*
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* Throws if a block doesn't have the specified (mandatory) key.
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*
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* @param option the blocks to search
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* @param key the attribute name
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* @param value the expected attribute value
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*/
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gcc_pure
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const ConfigBlock *FindBlock(ConfigBlockOption option,
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const char *key, const char *value) const;
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ConfigBlock &MakeBlock(ConfigBlockOption option,
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const char *key, const char *value);
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};
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#endif
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