/srv/osrm/osrm-backend/include/util
Edit: /srv/osrm/osrm-backend/include/util/fingerprint.hpp (1166B)
#ifndef FINGERPRINT_H
#define FINGERPRINT_H
#include
#include
#include
#include
namespace osrm::util
{
// implements a singleton, i.e. there is one and only one conviguration object
struct FingerPrint
{
static FingerPrint GetValid();
bool IsValid() const;
bool IsDataCompatible(const FingerPrint &other) const;
int GetMajorVersion() const;
int GetMinorVersion() const;
int GetPatchVersion() const;
private:
std::uint8_t CalculateChecksum() const;
// Here using std::array so that == can be used to conveniently compare contents
std::array magic_number;
std::uint8_t major_version;
std::uint8_t minor_version;
std::uint8_t patch_version;
std::uint8_t checksum; // CRC8 of the previous bytes to ensure the fingerprint is not damaged
};
static_assert(sizeof(FingerPrint) == 8, "FingerPrint has unexpected size");
static_assert(std::is_trivial::value, "FingerPrint needs to be trivial.");
static_assert(std::is_pod::value, "FingerPrint needs to be a POD.");
} // namespace osrm::util
#endif /* FingerPrint_H */