RexxInternalStack.hpp

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/******************************************************************************/
/* REXX Kernel                                        RexxInternalStack.hpp   */
/*                                                                            */
/* Primitive Expression Stack Class Definitions                               */
/*                                                                            */
/******************************************************************************/
 
#ifndef Included_RexxInternalStack
#define Included_RexxInternalStack
 
class RexxInternalStack : public RexxInternalObject {
 public:
  inline void *operator new(size_t size, void *ptr) { return ptr; }
  inline void  operator delete(void *) { ; }
  inline void  operator delete(void *, void *) { ; }
 
  RexxInternalStack() { ; }
  inline RexxInternalStack(RESTORETYPE restoreType) { ; }
  void live(size_t);
  void liveGeneral(int reason);
  void flatten(RexxEnvelope *);
 
  inline void         push(RexxObject *value) { *(++this->top) = value; };
  inline RexxObject * pop() { return *(this->top--); };
  inline RexxObject * fastPop() { return *(this->top--); };
  inline void         replace(size_t offset, RexxObject *value) { *(this->top - offset) = value; };
  inline size_t       getSize() {return this->size;};
  inline RexxObject * getTop()  {return *(this->top);};
  inline void         popn(size_t c) {this->top -= c;};
  inline void         clear() {this->top = this->stack;};
  inline RexxObject * peek(size_t v) {return *(this->top - v);};
  inline RexxObject **pointer(size_t v) {return (this->top - v); };
  inline size_t       location() {return this->top - this->stack;};
  inline void         setTop(size_t v) {this->top = this->stack + v;};
  inline void         toss() { this->top--; };
  inline bool         isEmpty() { return top == stack; }
  inline bool         isFull() { return top >= stack + size; }
 
  static RexxInternalStack *newInstance(size_t s);
 
protected:
 
  size_t size;                         /* size of the expstack              */
  RexxObject **top;                    /* current expstack top location     */
  RexxObject *stack[1];                /* actual stack values               */
};
 
 
inline RexxInternalStack *new_internalstack(size_t s) { return RexxInternalStack::newInstance(s); }
#endif