www.pudn.com > fips15.zip > hdstruct.h

/* 
	FIPS - the First nondestructive Interactive Partition Splitting program 
 
	Module hdstruct.h 
 
	RCS - Header: 
	$Header: c:/daten/fips/source/main/RCS/hdstruct.h 1.4 1995/01/19 00:01:26 schaefer Exp schaefer $ 
 
	Copyright (C) 1993 Arno Schaefer 
 
	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 2 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, write to the Free Software 
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
 
 
	Report problems and direct all questions to: 
 
	schaefer@rbg.informatik.th-darmstadt.de 
*/ 
 
#ifndef HDSTRUCT_H 
#define HDSTRUCT_H 
 
#include "types.h" 
#include "disk_io.h" 
 
 
/* ----------------------------------------------------------------------- */ 
/* Class root_sector - derived from structure sector                        */ 
/* Must be initialized with a pointer to a physical_drive object           */ 
/* Read() and Write() read/write sector 0 of physical drive                */ 
/* ----------------------------------------------------------------------- */ 
 
class root_sector:public sector 
{ 
	physical_drive *drive; 
public: 
// constructors and operators 
 
	root_sector (physical_drive *drive) { root_sector::drive = drive; } 
	root_sector (root_sector &rs); 
	void operator= (root_sector &rs); 
 
 
// functions 
 
	int read (void) { return drive->read_sector (this, 0); } 
	int write (void) { return drive->write_sector (this, 0); } 
}; 
 
 
/* ----------------------------------------------------------------------- */ 
/* Partition Info Structure                                                */ 
/* Each entry in the partition table contains this information             */ 
/* ----------------------------------------------------------------------- */ 
 
struct partition_info 
{ 
	byte bootable;                  // 80h or 0 
	byte start_head;                // location of first sector (boot_sector) 
	word start_cylinder; 
	byte start_sector; 
	byte system;			// 1 = 12-bit FAT 
					// 4 = 16-bit FAT & 16-bit sector number 
					// 6 = 16-bit FAT & 32-bit sector number (BIGDOS) 
	byte end_head;                  // location of last sector 
	word end_cylinder; 
	byte end_sector; 
	dword start_sector_abs;         // = start_cylinder * heads * sectors 
					// + start_head * sectors + start_sector - 1 
	dword no_of_sectors_abs;        // = end_cylinder * heads * sectors + end_head * sectors 
					// + end_sector - start_sector_abs 
}; 
 
 
/* ----------------------------------------------------------------------- */ 
/* Partition Table Structure                                               */ 
/* The partition table consists of 4 entries for the 4 possible partitions */ 
/* Get() reads the partition table from the root_sector, put() writes the   */ 
/* data back into the root_sector buffer                                    */ 
/* ----------------------------------------------------------------------- */ 
 
struct partition_table 
{ 
	partition_info partition_info[4]; 
	void get (root_sector *root_sector); 
	void put (root_sector *root_sector); 
}; 
 
 
/* ----------------------------------------------------------------------- */ 
/* Harddrive Class, derived from physical_drive                            */ 
/* Represents one physical harddrive. Must be initialized with the drive   */ 
/* number (0x80 for 1st HDD). Contains the root_sector and partition table. */ 
/* ----------------------------------------------------------------------- */ 
 
class harddrive:public physical_drive 
{ 
	partition_table pr_partition_table; 
 
public: 
// constructors, destructors, operators 
 
	harddrive (int number):physical_drive (number) 
	{ 
		root_sector = new class root_sector (this); 
	} 
	harddrive (harddrive &hd):physical_drive (hd) 
	{ 
		root_sector = new class root_sector (*(hd.root_sector)); 
		partition_table () = hd.partition_table (); 
	} 
	void operator= (harddrive &hd); 
	~harddrive (void) { delete root_sector; } 
 
// public data 
 
	root_sector *root_sector; 
 
// member access functions 
 
	virtual partition_table &partition_table() { return pr_partition_table; } 
 
// functions 
 
	int read_root_sector (void) { return (root_sector->read ()); } 
	int write_root_sector (void) { return (root_sector->write ()); } 
 
	void get_partition_table (void);	// extract pt data from root sector 
	void put_partition_table (void)		// put pt data into root sector 
	{partition_table().put (root_sector);} 
}; 
 
#endif