// header for class that stores and retrieves program lines
#ifndef ProgLines_h
#define ProgLines_h

class ProgLines {
  public:
    ProgLines();
    ~ProgLines();
    bool addLine(char *pLine);
    void executeNext(); // called by loop() while program running
    bool setNextLine(short);
    void advanceLine(); // sets the next line (public as needs to be called by Basic after user INPUT)
    int getNextLine();
  private:
    int nextLine;
    bool storeLine(short, char*, int);
    bool isLine(short);
    void listLines();
    void newProgram();
    void runProg();
    bool deleteLine(short);
    void displayError(int, short);
    void loadTest();
    struct bLine{
      short lNum;
      bLine* prev;
      bLine* next;
      void* cText;
      byte textLen;
    };
    bLine* firstLine;
    bool gotoExec;
};

extern ProgLines progLines;
#endif