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HDSTRUCT.H
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C/C++ Source or Header
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1994-05-26
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6KB
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167 lines
/*
FIPS - the First nondestructive Interactive Partition Splitting program
Module hdstruct.h
RCS - Header:
$Header: c:/daten/fips/source/main/RCS/hdstruct.h 1.1 1994/05/25 22:20:25 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"
#include "logdr_st.h"
/* ----------------------------------------------------------------------- */
/* Class rootsector - 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 rootsector:public sector
{
physical_drive *drive;
public:
int read (void) { return sector::read (drive,0); }
int write (void) { return sector::write (drive,0); }
rootsector (physical_drive *drive) { rootsector::drive = drive; }
rootsector (rootsector &rs);
void operator= (rootsector &rs);
};
/* ----------------------------------------------------------------------- */
/* 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 (bootsector)
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 rootsector, put() writes the */
/* data back into the rootsector buffer */
/* ----------------------------------------------------------------------- */
struct partition_table
{
partition_info partition_info[4];
void get (rootsector *rootsector);
void put (rootsector *rootsector);
};
/* ----------------------------------------------------------------------- */
/* Harddrive Class, derived from physical_drive */
/* Represents one physical harddrive. Must be initialized with the drive */
/* number (0x80 for 1st HDD). Contains the rootsector and partition table. */
/* ----------------------------------------------------------------------- */
class harddrive:public physical_drive
{
partition_table pr_partition_table;
public:
rootsector *rootsector;
virtual partition_table &partition_table() { return pr_partition_table; }
harddrive (int number):physical_drive (number)
{
rootsector = new class rootsector (this);
}
harddrive (harddrive &hd):physical_drive (hd)
{
rootsector = new class rootsector (*(hd.rootsector));
partition_table () = hd.partition_table();
}
void operator= (harddrive &hd);
~harddrive (void) { delete rootsector; }
};
/* ----------------------------------------------------------------------- */
/* Raw Partition Class */
/* Represents one partition from the partition table (may be non-DOS) */
/* Initialization with the pointer to the harddrive object and the */
/* partition number (0-3) */
/* ----------------------------------------------------------------------- */
class raw_partition
{
public:
int number;
physical_drive *drive;
partition_info *partition_info;
raw_partition (class harddrive *drive,int number)
{
raw_partition::number = number;
raw_partition::drive = drive;
partition_info = &(drive->partition_table().partition_info[number]);
}
};
/* ----------------------------------------------------------------------- */
/* Partition Class, derived from logical_drive and raw_partition */
/* Represents one primary DOS partition. Read_sector() and write_sector() */
/* are instances of the virtual functions in the logical_drive class */
/* ----------------------------------------------------------------------- */
class partition:public logical_drive,public raw_partition
{
public:
int read_sector (dword number,sector *sector)
{
return (sector->read (drive,partition_info->start_sector_abs + number));
}
int write_sector (dword number,sector *sector)
{
return (sector->write (drive,partition_info->start_sector_abs + number));
}
partition (class harddrive *drive,int number):raw_partition(drive,number)
{
bootsector = new class bootsector (this);
}
~partition (void) { delete bootsector; }
};
#endif