mirror of
https://github.com/eried/portapack-mayhem.git
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102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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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, or (at your option)
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* 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
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __AIS_PACKET_H__
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#define __AIS_PACKET_H__
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#include "baseband_packet.hpp"
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#include "field_reader.hpp"
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#include "lpc43xx_cpp.hpp"
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using namespace lpc43xx;
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#include <cstdint>
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#include <cstddef>
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#include <string>
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namespace ais {
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struct DateTime {
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uint16_t year;
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uint8_t month;
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uint8_t day;
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uint8_t hour;
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uint8_t minute;
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uint8_t second;
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};
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using Latitude = int32_t;
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using Longitude = int32_t;
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using MMSI = uint32_t;
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class Packet {
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public:
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constexpr Packet(
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const rtc::RTC& received_at,
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const baseband::Packet& packet
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) : packet_ { packet },
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received_at_ { received_at },
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field_ { packet_ }
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{
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}
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size_t length() const;
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bool is_valid() const;
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rtc::RTC received_at() const;
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uint32_t message_id() const;
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MMSI user_id() const;
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MMSI source_id() const;
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uint32_t read(const size_t start_bit, const size_t length) const;
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std::string text(const size_t start_bit, const size_t character_count) const;
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DateTime datetime(const size_t start_bit) const;
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Latitude latitude(const size_t start_bit) const;
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Longitude longitude(const size_t start_bit) const;
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bool crc_ok() const;
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private:
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using Reader = FieldReader<baseband::Packet, BitRemapByteReverse>;
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using CRCReader = FieldReader<baseband::Packet, BitRemapNone>;
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const baseband::Packet packet_;
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const rtc::RTC received_at_;
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const Reader field_;
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const size_t fcs_length = 16;
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size_t data_and_fcs_length() const;
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size_t data_length() const;
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bool length_valid() const;
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};
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} /* namespace ais */
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#endif/*__AIS_PACKET_H__*/
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