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62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
#ifndef PYXIS_TELEMETRY_LOCATION_STATE_RECORD_H
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#define PYXIS_TELEMETRY_LOCATION_STATE_RECORD_H
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#include <cstddef>
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#include <cstdint>
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#include "LocationShareScheduler.h"
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#include "LocationShareState.h"
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namespace Telemetry {
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constexpr uint16_t LOCATION_STATE_SCHEMA_VERSION = 1;
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constexpr std::size_t LOCATION_STATE_HEADER_BYTES = 16;
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constexpr std::size_t LOCATION_STATE_SESSION_BYTES = 34;
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constexpr std::size_t LOCATION_STATE_LOCATION_BYTES = 86;
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constexpr std::size_t LOCATION_STATE_CRC_BYTES = 4;
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constexpr std::size_t MAX_LOCATION_STATE_RECORD_BYTES =
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LOCATION_STATE_HEADER_BYTES +
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MAX_SHARE_SESSIONS * LOCATION_STATE_SESSION_BYTES +
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MAX_PEER_LOCATIONS * LOCATION_STATE_LOCATION_BYTES +
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LOCATION_STATE_CRC_BYTES;
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static_assert(MAX_LOCATION_STATE_RECORD_BYTES <= 4096,
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"persistent location record must remain bounded to 4 KiB");
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struct LocationStateSnapshot {
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std::size_t session_count = 0;
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ShareRestoreEntry sessions[MAX_SHARE_SESSIONS]{};
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std::size_t location_count = 0;
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PeerLocationRecord locations[MAX_PEER_LOCATIONS]{};
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};
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enum class LocationStateRecordResult : uint8_t {
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OK,
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INVALID_ARGUMENT,
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BUFFER_TOO_SMALL,
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BAD_MAGIC,
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UNSUPPORTED_VERSION,
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MALFORMED,
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CRC_MISMATCH,
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OUT_OF_RANGE,
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DUPLICATE_PEER,
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};
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LocationStateRecordResult encodeLocationStateRecord(
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const LocationStateSnapshot& input,
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uint8_t* output,
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std::size_t capacity,
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std::size_t& written_or_required);
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LocationStateRecordResult decodeLocationStateRecord(
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const uint8_t* data,
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std::size_t size,
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LocationStateSnapshot& output);
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LocationStateRecordResult validateLocationStateRecord(
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const uint8_t* data,
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std::size_t size);
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} // namespace Telemetry
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#endif // PYXIS_TELEMETRY_LOCATION_STATE_RECORD_H
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