ivoc.h

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#ifndef oc_h
#define oc_h

#include <Dispatch/iohandler.h>
#include <Dispatch/dispatcher.h>
#include <InterViews/session.h>
#include <OS/string.h>
#include <stdio.h>
#include <ivstream.h>
class Observer;
class Observable;
class Cursor;
struct Object;

class HandleStdin: public IOHandler {
public:
   HandleStdin();
        virtual int inputReady(int fd);
        virtual int  exceptionRaised(int fd);
   boolean stdinSeen_;
   boolean acceptInput_; 
};

struct Symbol;
struct Symlist;

class Oc {
public:
   Oc();
   Oc(Session*, char* pname = nil, char** env = nil);
   virtual ~Oc();

   int run(int argc, char** argv);
   int run(const char *, boolean show_err_mes = true);

   Symbol* parseExpr(const char *, Symlist** = nil);
   double runExpr(Symbol*);
   static boolean valid_expr(Symbol*);
   static boolean valid_stmt(const char*, Object* ob = nil);
   const char* name(Symbol*);
   
   void notifyHocValue(); // loops over HocValueBS buttonstates.

   void notify(); // called on doNotify from oc
   void notify_attach(Observer*); // add to notify list
   void notify_detach(Observer*);
      
   void notify_freed(void (*pf)(void*, int)); // register a callback func
   void notify_when_freed(void* p, Observer*);
   void notify_when_freed(double* p, Observer*);
   void notify_pointer_disconnect(Observer*);
   
   static Session* getSession();
   static int getStdinSeen() {return handleStdin_->stdinSeen_;}
   static void setStdinSeen(boolean i) {handleStdin_->stdinSeen_ = i;}
   static boolean setAcceptInput(boolean);
   static boolean helpmode() {return helpmode_;}
   static void helpmode(boolean);
   static void helpmode(Window*);
   static void help(const char*);

   static ostream* save_stream;
   static void cleanup();
private:
   static int refcnt_;
   static Session* session_;
   static HandleStdin* handleStdin_;
   static boolean helpmode_;
   static Cursor* help_cursor();
   static Cursor* help_cursor_;
   static Observable* notify_change_;
};

#endif