#ifndef LIBPDU_H
#define LIBPDU_H


#define NPC7    63


class PDU {

  public:
    PDU (){ this->tp_dcs_alpha = 0; };
    ~PDU (){};
    int setText(String);
    int setSender(String);
    String encode(void);
    String decode(String);
    String decode(String, uint8_t);

  private:
    int     smsc_length;
    int     smsc_type_of_address;
    String  smsc_number;
    int     sms_deliver;                    //SMS-DELIVER message
    int     sender_length;
    int     sender_type_of_address;
    String  sender_number;
    int     tp_length;                      // lenght of data ( dependent of dcs)
    String  tp_data;                        // the data of the message
    String  tp_text;                        //--internal use for storing sms text before creating the pdu string
    int     tp_dcs_alpha;                   //--internal use for storing alphabet size when creating the pdu string

    String semiOctetToString (String);
    String stringToSemiOctet (String);

    int hexStringToInt (String);
    String intToHexString (int);

    int binStringToInt (String);
    String intToBinString (int);

    int pow(int , int );
    String userTextTo7(void);

};


#endif //LIBPDU_LIBPDU_H