cnav/cnav.H

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// Copyright (C) 2003, 2004 Pablo Mejia


#ifndef CAJUN_CNAV_H
#define CAJUN_CNAV_H


#include <vector>


namespace cajun
{
        class input_buffer_t;

        class cnav_t
        {
        public:
                cnav_t ();
                ~cnav_t ();

                void handle_input (int fd);

                class observer_t
                {
                public:
                        enum cnav_message_t
                        {
                                STATUS_FULL_BUFFER,
                                STATUS_GARBAGE_DATA
                        };

                        virtual ~observer_t () {}
                        virtual void publish_status (double tstamp,
                                                     unsigned status) {}
                        virtual void cog (double tstamp, double cog) {}
                        virtual void position (double tstamp, double lat,
                                               double lon, double z) {}
                        virtual void sog (double tstamp, double sog) {}
                };

                void register_observer (observer_t *observer)
                {
                        m_observer = observer;
                }

        protected:
                input_buffer_t *m_ib;

                double m_tstamp;
                observer_t *m_observer;

                void decode (unsigned char const *beg,
                             unsigned char const *end);

                struct token_t
                {
                        unsigned char const *beg;
                        unsigned len;
                };
                std::vector<token_t> m_token;

                void decode_gga (void);
                void decode_vtg (void);
        };
};


#endif

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