HDSTRUCT.H
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上传日期:2007-02-01
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操作系统开发
开发平台:
C/C++
- /*
- 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