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https://github.com/MaSzyna-EU07/maszyna.git
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Hirek193
7cb6f789f5
Adds the transport-independent core of the MaSzyna Hardware Protocol v2: COBS framing with a CRC32C protected 24 byte header, bounds checked payload readers and writers, and a resynchronising stream decoder. The shared TrainState registry describes simulator state in engineering units with per-value quality, the command registry generates the command namespace from Commands_descriptions, and the symbol registry merges both into the public, name-addressed hardware api.
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <limits>
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#include <optional>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "hardware/protocol/protocol_defs.h"
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// public symbol table of the hardware api
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// merges the state and command registries into one namespace-prefixed list; devices refer to symbols
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// by these names and receive short, session scoped handles in return
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namespace hardware
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{
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struct symbol_descriptor
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{
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// full public name, i.e. "state.velocity" or "command.trainbrakeset"
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std::string name;
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symbol_kind kind = symbol_kind::state;
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value_type type = value_type::float32;
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std::uint8_t access = access_read;
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std::string unit;
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std::optional<double> minimum;
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std::optional<double> maximum;
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// index into the registry the symbol originates from
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std::size_t source_index = 0;
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};
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class symbol_registry
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{
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public:
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// types
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static constexpr std::size_t npos = std::numeric_limits<std::size_t>::max();
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// methods
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static symbol_registry const &instance();
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std::vector<symbol_descriptor> const &entries() const { return m_entries; }
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// returns index of the symbol, or npos if the name isn't known
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std::size_t find( std::string const &Name ) const;
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private:
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// methods
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symbol_registry();
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// members
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std::vector<symbol_descriptor> m_entries;
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std::unordered_map<std::string, std::size_t> m_index;
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};
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} // namespace hardware
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