status.hpp

伪随机数生成器

// status.hpp		An Object Error Status class, to be inherited by
//			classes that need it.  Inherit this class as public VIRTUAL
//		Note: This class cannot be inherited by classes for which the
//			! operator or a cast to an int would make sense
// rcsid: @(#)status.hpp	1.1 13:33:52 10/14/93   EFC

#ifndef STATUS_HPP_
#define STATUS_HPP_ 1.1

class ErrorStatus
{
	protected:
	     int err_flag;
	     virtual void set_flag(const int flag) { err_flag = flag; }
	     virtual void reset_flag()             { err_flag = 0;    }

             ErrorStatus() : err_flag(0) {}

	public:
	     virtual ~ErrorStatus() {}

          // getting the status of the object

          // the actual status flag
          virtual int status()  { return err_flag; }

          // nonzero if good
          operator int()        { return status() == 0; }

          // nonzero if bad
          int operator!()       { return status() != 0; }


};

#endif