/******************************************************
* Rapid Embedded Development Architecture (redA)      *
* Copyright (C) 2008 RecoSys                          *
* --------------                                      *
* TLiteProtcol:                                       *
* Simplified protocol object to allow for fast        *
* communications between componets                    *
*                                                     *
* Contents:                                           *
* CLiteProtocol - Core of simple protocol             *
*                                                     *
******************************************************/

#ifndef LITE_PROTOCOL_CORE
#define LITE_PROTOCOL_CORE

using namespace std;

// redA Libraries
/* none */

// Standard C/C++ Libraries
#include <unistd.h>

//---------------------------------------------------------------------------

// Very Simple Lightweight Protcol
class CLiteProtocol
{
    protected:
        // Parameters
        int     BufferInc;

        char    StartChar;
        char    EndChar;
        char    Separator;

        char    *CommandStr;
        int     BufferSize;

        long    Length;
        int     NoOfParams;

        bool    Verified;
        char    Error[100];

        int     CurrPos;
        int     CurrParam;

        // Internal tools
        bool    IncCommandStr( int pLength );
        bool    UpdateCommandStr();
        bool    VerifyStr( char * pString, int pLength, int &ParamCount, char * pError );

    public:
        // Constructor & Destructor
        CLiteProtocol( int pBufferInc, char pStartChar = 0x02, char pEndChar = 0x03, char pSeparator = 0x00 );
        ~CLiteProtocol();

        // Set Command string
        bool    ClearCommandStr();
        bool    NewCommandStr();
        bool    SetCommandStr( char * pString, int pLength, char * Error );
        bool    AppendCommandStr( char *pString, int &pLength );
        bool    VerifyCommandStr();

        // Get Command String
        char*   GetCommandStr( char ** pString = NULL, int * pLength = NULL );
        int     GetCommandLen()     { return Length; };
        int     GetNoOfParams()     { return NoOfParams; };
        bool    isVerified()        { return Verified; };
        char*   GetError()          { return Error; };

        // Set Parameters
        bool    AppendParam( const char * pString, const int pLength );
        bool    AppendParam( long pValue );
        bool    AppendParam( double pValue, int pDigits );

        // Get Parameters
        char const *    GetParamNo( int ParamNo, char ** pString = NULL, int * pLength = NULL );
        bool            GotoParam( int ParamNo );
        bool            NextParam();
        char const *    GetParam( char ** pString = NULL, int * pLength = NULL );
};

#endif /* LITE_PROTOCOL_CORE */