#ifndef DCCEXParser_h
#define DCCEXParser_h
#include <Arduino.h>

typedef void (*FILTER_CALLBACK)(Print & stream, byte & opcode, byte & paramCount, int p[]);

struct DCCEXParser
{
   DCCEXParser();
   void loop(Stream & pstream);
   void parse(Print & stream, const byte * command, bool banAsync);
   void flush();
   static void setFilter(FILTER_CALLBACK filter);
   static const int MAX_PARAMS=10;  // Must not exceed this
 
   private:
  
    static const int MAX_BUFFER=50;  // longest command sent in
     byte  bufferLength=0;
     bool  inCommandPayload=false;
     bool  asyncBanned;   // true when called with stream that must complete before returning
     byte  buffer[MAX_BUFFER+2]; 
    int splitValues( int result[MAX_PARAMS], const byte * command);
     
     bool parseT(Print & stream, int params, int p[]);
     bool parseZ(Print & stream, int params, int p[]);
     bool parseS(Print & stream,  int params, int p[]);
     bool parsef(Print & stream,  int params, int p[]);

    
    static bool stashBusy;
   
    static Print & stashStream;
    static int stashP[MAX_PARAMS];
    bool stashCallback(Print & stream, int p[MAX_PARAMS]);
    static void callback_W(int result);
    static void callback_B(int result);        
    static void callback_R(int result);
    static FILTER_CALLBACK  filterCallback;
    static void funcmap(int cab, byte value, byte fstart, byte fstop);
     
};

#define BOARD_NAME F("not yet configured")
#endif