GPS_NMEA_Serial.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2005, Copyright University Corporation for Atmospheric Research
 **
 ** This program is free software; you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation; either version 2 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/

#ifndef NIDIS_DYNLD_GPS_NMEA_SERIAL_H
#define NIDIS_DYNLD_GPS_NMEA_SERIAL_H

#include <nidas/core/SerialSensor.h>

namespace nidas { namespace dynld {

    using namespace nidas::core;

class GPS_NMEA_Serial: public SerialSensor
{
public:

    GPS_NMEA_Serial();

    void validate() throw(nidas::util::InvalidParameterException);

    bool process(const Sample* samp,std::list<const Sample*>& results)
        throw();

    static bool
    checksumOK(const char* rec,int len);

    static bool
    findChecksum(char& checksum, const char* rec, int len);

    static char
    calcChecksum(const char* rec, int len);

    static void
    appendChecksum(char* rec, int len, int maxlen);

    SampleScanner* buildSampleScanner()
        throw(nidas::util::InvalidParameterException);

    dsm_time_t parseGGA(const char* input,double *dout,int nvars,dsm_time_t tt) 
        throw();

    dsm_time_t parseRMC(const char* input,double *dout,int nvars,dsm_time_t tt)
        throw();

    dsm_time_t parseHDT(const char* input,double *dout,int nvars,dsm_time_t tt)
        throw();

protected:

    dsm_time_t _ttgps;

    int _ggaNvars;

    dsm_sample_id_t _ggaId;

    int _rmcNvars;

    dsm_sample_id_t _rmcId;

    int _hdtNvars;

    dsm_sample_id_t _hdtId;

#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int GGA_SAMPLE_ID;
#else
    static const int GGA_SAMPLE_ID = 1;
#endif

#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int RMC_SAMPLE_ID;
#else
    static const int RMC_SAMPLE_ID = 2;
#endif

#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
    static const int HDT_SAMPLE_ID;
#else
    static const int HDT_SAMPLE_ID = 3;
#endif

    unsigned int _badChecksums;
    unsigned int _badChecksumsCount;
    
    std::map<int,std::string> _allowedSampleIds;
};

}}  // namespace nidas namespace dynld

#endif