esi_unit.h

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#pragma once
 
#include <cstdint>
#include <nlohmann/json_fwd.hpp>
#include <span>
#include <string>
#include <string_view>
 
namespace mm::etg {
 
struct UnitType {
  uint8_t notationIndex = 0;  
  uint32_t index = 0;         
  std::string name;           
  std::string symbol;         
};
 
struct UnitNotation {
  uint8_t notationIndex = 0;
  std::string_view symbol;
  std::string_view name;
};
 
struct UnitParts {
  uint8_t prefix = 0;
  uint8_t numerator = 0;
  uint8_t denominator = 0;
  uint8_t reserved = 0;
};
 
constexpr UnitParts esiUnitParts(uint32_t unit) {
  return UnitParts{
      .prefix = static_cast<uint8_t>((unit >> 24) & 0xFF),
      .numerator = static_cast<uint8_t>((unit >> 16) & 0xFF),
      .denominator = static_cast<uint8_t>((unit >> 8) & 0xFF),
      .reserved = static_cast<uint8_t>(unit & 0xFF),
  };
}
 
std::string esiUnitSymbol(uint32_t unit, std::span<const UnitType> local = {});
 
void to_json(nlohmann::json& j, const UnitType& unit);
 
}  // namespace mm::etg