/*
    Class declaration for the Random_IO class
	The Random_IO class can be used independently or as part of the MiniDB project.

    Copyright (C) 1995  Hossein Hakimzadeh

	Comments and bug fixes can be sent to hhakimza@iusb.edu

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

*//*---------------------------------------------------------------*/
/* Random_IO.h                                                   */
/* -----------                                                   */
/* Random Access I/O class (C++ version)                         */
/* This is a C++ implementation of the RandomIO class.  The      */
/* original RandomIO class was implemented in C.                 */
/*---------------------------------------------------------------*/
/* The following is a class for performing Random Access I/O.    */
/* Feel free to use these functions for your current             */
/* and future programs.                                          */
/*                                                               */
/* Send bug reports as well as improvements to :                 */
/*                                                               */
/*      e-mail:         hhakimza@iusb.edu                        */
/*                                                               */
/*  Author:     Hossein Hakimzadeh and Paul Nixon                */
/*  Purpose:    Utility functions                                */
/*  Compiler:   Borland or Turbo C++                             */
/*  Date:       April 20, 1995                                   */
/*  Update:     Dec 4, 1996  (converted to C++)                  */
/*              Aug 2, 2008  (converted to Visual C++)           */
/*---------------------------------------------------------------*/ 
//-----------------------------------------------------------------------//

#ifndef RANDOM_IO_H
#define RANDOM_IO_H
//-----------------------------------------------------------------------//
#define OPEN	0
#define CLOSED  1

#define ON		1
#define OFF		0
//-----------------------------------------------------------------------//

class Random_IO {
	fstream RandomFile;            // Random access file
	int     Status;                // OPEN or CLOSED
	int     Verbose;               // Verbose flag (ON /OFF)

 public:
	Random_IO(void); 
	~Random_IO(void); 

	void Initialize(long start_address, long size, char filler_char);

	int  OpenRandom(char *file_name);
	void CloseRandom(void);

	void ReadRandom(long start_address, unsigned size, char *in_buffer);
	void WriteRandom(long start_address, unsigned size, char *out_buffer);
	void AppendRandom(unsigned size, char *out_buffer);

	unsigned long FileSize();
	void DisplayRandom(long start_address, unsigned size);
};

#endif